Just fill in the form below, click submit, you will get the price list, and we will contact you within one working day. Please also feel free to contact us via email or phone. (* is required).

heavy duty steel fabrication of crushers using method

  • FABRICATION AND ERECTION OF STRUCTURAL ... - steel

    2018-4-12 · In this method, the steel is heated locally by a pressurised mixture of oxygen and a combustible gas such as propane, which passes through a ring of small holes in a cutting nozzle. The heat is focussed on to a very narrow band and the steel melts at 15000 C when a jet of high-pressure oxygen is released through a separate hole in the centre of the

    Get Price
  • heavy duty rock crusher equipment for road |

    Lorem ipsum is simply free text dolor sit am adipi we help you ensure everyone is in the right jobs sicing elit, sed do consulting firms Et leggings across the nation tempor.

    Get Price
  • Guide: Basic Sheet Metal Fabrication Techniques |

    2019-11-18 · These high-capacity, high-efficiency stainless steel lined electric sample drying ovens are available in two sizes: complete with one or two heavy-duty, wheel-in/wheel-out trolleys. Rotary Sample Dividers These dividers are built for the accurate division of bulk laboratory samples into representative sub-samples. The comprehensive

    Get Price
  • Practical innovations - FLSmidth

    2019-11-11 · Structural Shapes – standard steel configurations produced by steel mills such as wide flanges, channels, angles, pipe, tubes, etc. Structural Steel – the structural elements that make up the frame that are essential to supporting the design loads, e.g. beams, columns, braces, plate, trusses, and fasteners. It does not include for example cables,

    Get Price
  • STRUCTURAL STEEL DESIGN AND CONSTRUCTION

    2020-11-17 · Water jet cutting is a sheet metal fabrication method that uses a high-pressure jet of water (mixed with an abrasive substance) to cut through the metal. Water jet cutters are particularly useful for cutting sheet metals with a low melting point since they do …

    Get Price
  • A guide to sheet metal fabrication processes: cutting ...

    Known as Mortar skip or Tower crane skip. An all-steel, heavy duty construction tower crane skip for quick site lifting. The Worfet crane Skips are designed for moving or storing smaller materials, equipment, and waste. It can be maneuvered by a forklift or a crane.

    Get Price
  • Lifting equipment & Steel Fabrication works Dubai #1|

    INSTALL AND USE: Heavy duty steel construction soft cushion grip handle, Mounts to any indoor or outdoor solid surface, wall or table with our screws. Efficient one hand operated recycling and garbage crushing tool reducing the size of tall aluminum seltzer, soda, beer and pop jars - …

    Get Price
  • Amazon.com: 16 oz. Metal Can Crusher/Smasher,

    Install all bolts in rafter splices to proper tension, using turn-off-nut method and torque wrench. Raise the first assembled rafter on top of column by cranes. Install bolts of rafter through column connection and tighten to snug position.

    Get Price
  • Steel Structure Building Construction Procedure –

    About Us. Established in the year 2000, at Ludhiana (Punjab, India), we “Jasvir Industries” are an eminent manufacturer and supplier of a supreme quality range of Sugarcane Machines and Trolleys. In our broad product range, we offer Sugarcane Machine, Ice-cream Trolley, Trolley, Rickshaw Carrier and Ice Cream Rickshaw.

    Get Price
  • heavy duty rock crushers videos - waldemarpanek.pl

    Heavy Duty Rock Crusher Motors | Size Reduction ... Available through 500 horsepower, our variable frequency drive packages are often used on crushing or feeder applications. They are complete, packaged drives (part of the heavy duty series of our closed drive packages) that allows for variable speed changes for rock crushers, feeders or conveyors.

    Get Price
  • Heavy Steel Fabrication | Hartwell

    2019-11-18 · one or two heavy-duty, wheel-in/wheel-out trolleys. Rotary Sample Dividers These dividers are built for the accurate division of bulk laboratory samples into representative sub-samples. The comprehensive range is designed to handle either traditional stainless steel bucket sets (RSD) or up to four segments with the residue passing to reject (RSDR).

    Get Price
  • Practical innovations - FLSmidth

    214/302, 3rd Floor, Charkop Shivaji CHS, Sector- 5, Opposite Charkop Bus Deposit, Charkop Kandivali West, Kandivali West, Mumbai - 400067, Dist. Mumbai, Maharashtra. TrustSEAL Verified Verified Exporter. View Mobile Number. Call +91-8048078515. Contact Supplier Request a quote. Heavy Steel Fabrication Service.

    Get Price
  • Heavy Steel Fabrication Service in India

    2015-4-3 · Crushers are also classified by their method of mechanically transmitted fracturing energy to the material. Jaw, gyratory and roll crushers work by applying compressive forces while impact crushers such as hammer crusher apply high speed impact force to accomplish fracturing. There are several types of crushers which are used in various industries.

    Get Price
  • Crushers and Their Types – IspatGuru

    STRUCTURAL STEEL TERMS LAYOUT AND FABRICATION OF STEEL AND PIPE ... operation may be accomplished by using a 2-foot level ... An alternate method is the seated connection (fig. 3-15). ...

    Get Price
  • STRUCTURAL STEEL TERMS LAYOUT AND FABRICATION

    2019-11-11 · 4 Code – The Code of Standard Practice for Steel Buildings and Bridges as published by the American Institute of Steel Construction. Column – a structural element that usually carries its primary loads in compression or tension parallel its axis. Column Base – usually a thick plate at the bottom of a column through which anchor bolts mechanically connect the column and transfer forces to the

    Get Price
  • STRUCTURAL STEEL DESIGN AND CONSTRUCTION

    Established in the year 2000, at Ludhiana (Punjab, India), we “Jasvir Industries” are an eminent manufacturer and supplier of a supreme quality range of Sugarcane Machines and Trolleys.In our broad product range, we offer Sugarcane Machine, Ice-cream Trolley, Trolley, Rickshaw Carrier and Ice Cream Rickshaw.Our entire product range is fabricated from high grade raw material using ...

    Get Price
  • Jasvir Industries, Ludhiana - Manufacturer of Heavy

    16oz Can Crushers Heavy-Duty Aluminum Can Compactor Wall-Mounted Smasher for Recycling Aluminum and Plastic Bottles, Soda, Beer Cans and Bottles (Red) 3.9 out of 5 stars. 59. 16.68. 16. . 68. Get it as soon as Thu, Mar 11. FREE Shipping on orders over 25 shipped by Amazon.

    Get Price
  • Amazon.com: heavy duty can crusher

    2020-12-17 · The Lark Accu-Steel frame building is the biggest advancement in portable building design and construction in the last 40 years. We manufacture Accu-Steel sheds using one of the most precise and advanced roll forming systems available. The strength, quality, and durability of this steel frame system are truly awesome.

    Get Price
  • AJ SERIES JAW CRUSHERS - CITIC-Heavy Industries Co. Ltd

    2015-11-9 · The CITIC-HIC AJ series Single Toggle Jaw range of Jaw crushers are a heavy duty design, focusing on productivity, availability, functionality, reliability, ease of maintenance and safety. The result of this is a crusher that is capable of reliably operating in some of the most arduous applications in the mining and aggregate industries Features

    Get Price
  • DESIGN OF MECHANICAL CRUSHING MACHINE

    2016-4-23 · for the cone crushers which are used to crush the rocks China University of Mining And Technology, have Chart-1: Work Methodology 4.2 Proposed Method The crusher that is designed is done in such a way that even a layman can operate it. The current crusher uses crank and slotted lever mechanism to crush the materials.

    Get Price
  • Peninsula Crusher Works

    Peninsula Crusher Works has been family owned & operated since 1917. With our journeyman level machinists & fabricators, custom tooling and in house engineering we have the ability to handle your project from start to finish. 35,000 sq ft of combined shop space and 110,000 lb lifting capacity allows us to handle even the largest components ...

    Get Price
  • Crushers and Their Types – IspatGuru

    2015-4-3 · Crushers are also classified by their method of mechanically transmitted fracturing energy to the material. Jaw, gyratory and roll crushers work by applying compressive forces while impact crushers such as hammer crusher apply high speed impact force to accomplish fracturing. There are several types of crushers which are used in various industries.

    Get Price
  • Heavy Fabrication in India

    Steel is a versatile material. Its resistance to corrosion and durability allows it to be used in a number of different storage applications when used to make steel tanks. At Swanton Welding we use steel that hold to rigid ASTM specifications, which guarantees strength, resistance to corrosion, and durability.

    Get Price
  • Steel Storage Tanks | Swanton Welding

    ASTM's steel standards are instrumental in classifying, evaluating, and specifying the material, chemical, mechanical, and metallurgical properties of the different types of steels, which are primarily used in the production of mechanical components, industrial parts, and construction elements, as well as other accessories related to them.

    Get Price
  • Steel Standards - ASTM

    McKay 16 oz. Metal Can Crusher, Heavy-Duty Wall-Mounted Smasher for Aluminum Seltzer, Soda, Beer Cans and Bottles for Recycling - Blue Brand: McKay 4.5 out of 5 stars 11,153 ratings

    Get Price
  • Amazon.com: McKay 16 oz. Metal Can Crusher, Heavy

    2015-12-30 · In this study, the lower link of a three-point hitch of new heavy duty ITM1500 tractor developed in Iran Tractor Manufacturing Co., was analyzed with regards to both static and dynamic conditions using finite element method. The 3-D link was modeled in Solid Works environment while Cosmos Works software was used for finite element analysis.

    Get Price
  • Optimization of a Lower Hitch Link for a Heavy Duty ...

    2020-6-18 · The accuracy to weigh heavy things with this method depends on accurate measurements for the beams, and placement of the load. ... Pre-Stressed Steel Fabrication. ... This is a heavy duty trailer. At 16K by 20' deck length and an option for 14,000 lbs or 16,000 lbs, this deck-over trailer is a workhorse. The plans are fully engineered and ready ...

    Get Price
  • Gyratory CRUSHERS - CITIC-Heavy Industries Co. Ltd

    2015-11-9 · Carbon steel - 600t SG Iron - 200t Non-ferrous - 20t Steel Ingot - 600t Foundry equipment includes: 80t, 50t, 30t Electric arc furnaces 2x150t, 1x60t,1x40t Ladle refining furnace 150t, 60t VD/VOD furnace Forgings CITIC HIC possess hydraulic presses of 18500t (the largest in the world), 8400t, 3150t, 1600t using Open die

    Get Price
  • Apron Feeder | Steel Pan Apron Conveyor | Williams

    Feeder Breakers. Williams Heavy Duty Feeder Breaker couples our manganese Apron Feeder with our Roll Crusher technology. This results in an extremely heavy duty machine. Williams Feeder Breakers are capable of conveying and crushing a wide range of minerals including frozen concentrates, coal, shale, clay, and more down to 6” and smaller.

    Get Price
  • Heavy Duty Food Floor Can Crusher - Home Recycling

    2017-1-4 · Structural Steel Design, Fabrication, and Construction Jamie F. Farris, P.E. TxDOT Bridge Division . October 11, 2011

    Get Price
  • Structural Steel Design, Fabrication, and Construction

    2020-6-5 · Grade 9 structural bolts, also known as grade 9 hex cap screws, are one the strongest structural bolts that can be used today. While the typical grade 8 bolt has a tensile strength of 150,000 PSI, a grade 9 bolt has a tensile strength of 180,000PSI. Grade 9 bolts are ideal for heavy-duty applications and are also often used in heavy machinery ...

    Get Price
  • Fabrication - SteelConstruction.info

    WIRE MESH/STEEL PANELS/PLYWOOD DECKING. HEAVY DUTY/SPIRAL STAIRCASE & RAMPS. AND ALL KINDS OF STEEL FABRICATION WORKS. On Going Projects. Services. We specializes in structural steel fabrication and installation, custom fabrication and crane construction. With over 20 years of experience, our certified, multi-disciplined team ensures our ...

    Get Price
  • Heavy Fabrication in India

    Standard duty flexible connectors shall be rated for 1600 kPa working pressure and 2400 kPa test pressure, up to 105 °C. Manufacturer shall certify that each unit is individually pressure tested. Connectors for pipe size 65 mm and above shall be of spherical single bellow design with captive steel floating flanges to facilitate alignment.

    Get Price
  • Jaw Crusher - an overview | ScienceDirect Topics

    Jaw crushers are heavy-duty machines and hence must be robustly constructed. The main frame is often made from cast iron or steel, connected with tie-bolts. It is commonly made in sections so that it can be transported underground for installation. Modern jaw crushers may have a main frame of welded mild steel …

    Get Price
  • Metal Can Crusher/Smasher, Heavy Duty Wall

    INSTALL AND USE:Heavy duty steel construction Very soft cushion grip handle, Mounts to any solid surface, wall or table with our screws. Efficient one hand operated recycling and garbage crushing tool reducing the size of tall aluminum seltzer, soda, beer and pop jars - pops open beer bottles and more.

    Get Price
  • The art of bevel cutting

    2020-6-5 · Grade 9 structural bolts, also known as grade 9 hex cap screws, are one the strongest structural bolts that can be used today. While the typical grade 8 bolt has a tensile strength of 150,000 PSI, a grade 9 bolt has a tensile strength of 180,000PSI. Grade 9 bolts are ideal for heavy-duty applications and are also often used in heavy machinery ...

    Get Price
  • Using High Strength Bolts for Structural Bolting | The ...

    Hot rolled steel is usually cheaper to produce than cold rolled steel. This is mainly because the hot rolled steel is more malleable, hence you don’t need heavier rollers or more production cycles to form a product. However, because its shape can shift after the process is over hot rolled steel can lead to additional reshaping expenditures ...

    Get Price
  • Hot Rolled Steel vs. Cold Rolled Steel | Swanton Welding

    2018-8-3 · 20. PVC insulated (Heavy Duty) electric cables for working voltage up to and including 1100 volts. IS-1554-1988 (Part-1) 21. Flexible steel conduits IS-3480-1966 22. Accessories for rigid steel conduit for electrical wiring IS-3837-1976 23. Boxes for the enclosure of …

    Get Price
  • Design, Fabrication, Supply, Installation & Commissioning ...

    If it’s made of steel or alloy, we can construct it, or repair it. (Such as gates, balustrades, stairs, farm equipment, trailers etc). We are able to custom make to your specifications, using affordable fabrication methods. Our general engineering services are performed with the utmost attention to detail and to the highest industry standards.

    Get Price
  • Our Services | Todd Engineering

    2016-4-29 · 1 .00 Maritime Welding Handbook Welding and Related Processes for Repair and Maintenance Onboard 14th edition 2nd revision Notice: All welding is carried out on the welder’s own risk and account. Welding should be executed by a qualified and experienced

    Get Price
  • The Welding Handbook - Wilhelmsen

    Our Productivity Introduction. VEE has more than 40 years’ experience in Engineering, Manufacturing Earthmoving Equipment and Liner Plates as per Client requirement.. We are a trust commendable Manufacturer and Service Provider of Excavator and Loader Buckets, Thumbs, Rakes, Shovel Buckets, Extended Long Reach Booms & Arms, Track Guards, Liner plates forBatching Plants and Mining …

    Get Price
  • V ENGINEERING ENTERPRISES | Mining Equipment &

    Standard duty flexible connectors shall be rated for 1600 kPa working pressure and 2400 kPa test pressure, up to 105 °C. Manufacturer shall certify that each unit is individually pressure tested. Connectors for pipe size 65 mm and above shall be of spherical single bellow design with captive steel floating flanges to facilitate alignment.

    Get Price
  • Hand arm vibration - Heavy steel fabrication

    2021-5-26 · Control of noise in heavy fabrication SIM 03/1001/14. [6] Removing fairing aids, lifting lugs, etc. using grinders. Design fairing and lifting processes to avoid temporary welded aids which must be removed by grinding. Use magnetic, vacuum or screw clamps and anchors instead of welded fairing aids.

    Get Price
  • Crushers and Their Types – IspatGuru

    2015-4-3 · Crushers are also classified by their method of mechanically transmitted fracturing energy to the material. Jaw, gyratory and roll crushers work by applying compressive forces while impact crushers such as hammer crusher apply high speed impact force to accomplish fracturing. There are several types of crushers which are used in various industries.

    Get Price
  • Heavy Duty Angle Brackets - KDM Steel

    KDM heavy duty angle brackets are easy to install in any corners to help clients save their efforts. About KDM Steel If you are looking for a professional enclosure or box for any of your application, KDM is your best choice, we can custom any types of enclosure for your business,send us …

    Get Price
  • Industrial Steel Frame Structure Building Fabrication ...

    Industrial Steel Frame Structure Building Fabrication Construction Heavy Duty. This steel frame structure building is used for a cooking oil production line. Welded steel structure components is connected to be the supporing for the equipment and the building. Glass wool …

    Get Price
  • Heavy Duty Castors - Steel Fabrication - Shop by

    Heavy Duty Castors - Steel Fabrication - Shop by Application. 0116 276 4987 Weekdays 8.30am to 4.30pm We're still open online! Please contact us via email or live chat for all enquires. UK (£) EU (€)

    Get Price
  • Large Scale Welding & Heavy Duty Welding China |

    CHINA SHUANGYI, Professional Heavy Duty Welding and Fabrication Company, We can cut up to 30cm (expandable if needed) and execute heavy weldments in excess of 200T, working with the heaviest metals available. Stainless Steel Fabrications, Carbon Steel, Bronze, Aluminum Fabrications and Monel.

    Get Price
  • Heavy Duty Pill Crusher with Container- Item 71091 |

    Showing Slide 1 of 1 - Carousel. 1 Pill Crusher Cutter Crush Medicine Tablets Vitamins Medication Grinder Storage. 7.99. Free shipping. Pill and Tablet Crusher with Pill Container Crushers hard-to-swallow Pills. 7.99. Free shipping. 2 X Pill Crusher Tablet Grinder Medicine Cutter Durable Plastic Grind Crush New. 11.99.

    Get Price
  • Welding & Fabrication - Gemmells

    That leads directly to better products and a better customer experience. We are committed to being there for our customers, exceeding their expectations for quality and turn-around time. With expanded capacity (we can run our machines 24/7), we provide a full spectrum of welding, laser cutting & fabrication services.. 8989. YRS EXPERIENCE. 8989.

    Get Price
  • JORGENSON Rolling - We Specialize in Rolling,

    2021-6-8 · The larger cylinder has an inside radius of 12” and the smaller has an inside radius of 6”. Both parts were also welded completely at the seam to form a complete cylinder in our custom fabrication department. We specialize is both rolling & bending of sheet metal and steel plate. We do press brake bending using our 500 ton 18 foot press brake.

    Get Price
  • Heavy Duty Steel Fabrication - steelfabservices.com.au

    2018-3-12 · Steel Fabrication Services is one of the most trusted heavy duty steel fabricators in Sydney. We have over 10 years’ experience in the steel fabrication industry are proud to work in a range of fields that involve heavy steel, from detailing and drafting , installation and delivery and working with structural steel .

    Get Price
  • The Lynch Company Steel Fabrication Services

    An optional extra heavy duty ductile iron grate with a 50,000 pound wheel load capacity is also available. A variety of options can be provided such as; ¼' plate construction, special inlet and outlet sizes, grates of various sizes and depths. Available also are smaller, code, area/turf drains using flat bar grates.

    Get Price
  • ArcForm - Welding, Steel Fabrication, Heavy Duty

    2015-2-8 · Welcome to our new site. Check back soon for more details about what we offer. ArcForm Solutions offers Environmental Geotechnical, Environmental Drilling, Environmental drilling supplies, Heavy Duty Mechanic service, Steel Fabrication, welding, and Steel Fabrication Solutions.

    Get Price
  • 'The Can Smasher' Heavy Duty Steel Aluminum C

    1 stores are offering it on Ebay with promotions. Other top attributes are recycling heavy duty, Heavy Duty and mpn. Also the can smasher heavy duty steel is one of the top 10 sellers in Unbranded, Steel Can Crushers For Recycling and H in 2021. Featured Smasher', for recycling 3' diameter to 4 3/4' (12 cans, screws Condition: New .

    Get Price
  • Metal Can Crusher/Smasher, Heavy Duty Wall

    INSTALL AND USE:Heavy duty steel construction Very soft cushion grip handle, Mounts to any solid surface, wall or table with our screws. Efficient one hand operated recycling and garbage crushing tool reducing the size of tall aluminum seltzer, soda, beer and pop jars - pops open beer bottles and more.

    Get Price
  • Heavy Duty Removable Bollards | Pruszinski Fabrication

    Heavy Duty Removable Bollards. The product uses a 125N/B pipe (140mm O/D) for the post with 150N/B pipe for the sleeves. Standard height is 900mm but they can be custom built higher if required for an additional charge. Sleeves are fully Hot Dip Galvanised, giving excellent corrosion resistance. Sleeves have a hinged lid that finishes ...

    Get Price
  • Heavy duty steel work tables - high capacity worktables

    Heavy Duty Steel Work Tables, All-Welded Ultra-high capacity for holding large, bulky loads Get Quote. All-welded steel construction provides enormous 15,000 pound capacity and extended durability in the toughest applications; Burly 7 gauge top is reinforced with 3' x 1-1/2' structural C channel beams for added strength ...

    Get Price
  • Heavy-Duty 8x8x3in Steel Welding Fabrication Fixture ...

    Details about Heavy-Duty 8x8x3in Steel Welding Fabrication Fixture Square Laser Cut. Heavy-Duty 8x8x3in Steel Welding Fabrication Fixture Square Laser Cut. Item information. ... Delivery time is estimated using our proprietary method which is based on the buyer's proximity to the item location, the delivery service selected, the seller's ...

    Get Price
  • Fabricated Heavy Duty Castors - Steel Fabrication -

    Steel Fabrication Fabricated Heavy Duty Castors; Filter By. Castor Type . Top plate Castors (1) Top Plate Castors (6) Colour . Green (1) Load Capacity (kg) 251-500kg (4) 501-1000kg (6) 1001+kg (3) Manufacturer . Keystone (3) Tente (3) Price ...

    Get Price
  • Heavy Duty Welder and Fabrication Companies |

    2021-6-15 · Heavy Duty Welder and Fabrication. The large variety of applications that Weldall can meet in the welding world require a large variety of processes and equipment to assure the proper results. Weldall has no shortage of capability and is always open to expanding to new processes if a new requirement would be met more efficiently or with higher ...

    Get Price
  • RKHE - RK Heavy Engineering Pvt. Ltd., Chennai

    2020-9-18 · Welcome to R K Heavy Engineering Pvt. Ltd., RKHE is an ISO 9001:2015 certified company, located in nearby Chengalpet (Chennai), Started in 2009. We are specialized in providing solution for all kind of steel Fabrication. Having efficient infrastructure for design, fabrication and installation. We have invested in developing long term customer ...

    Get Price
  • What is Metal Fabrication? | Summit Steel &

    2016-7-27 · Metal fabrication is a critical part of the manufacturing process. From paperclips to plane parts, it’s used to create a wide variety of products. Metal fabrication is an essential step in creating everything from hardware and tools to car parts and pipes. Fabricated metal products accounted for 345.1 billion of shipments in 2013 alone!

    Get Price
  • Extra Heavy Duty 2' Thick Top Steel Fabrication Table

    2021-2-11 · Heavy Duty Steel Welding/Work Table 157' x 83' x 32' Tall - 1/2' Thick Plate Top. ... Details about Extra Heavy Duty 2' Thick Top Steel Fabrication Table 75' x 70' ... Contact the seller- opens in a new window or tab and request a shipping method to your location. Shipping cost cannot be calculated. Please enter a valid ZIP Code.

    Get Price
  • Welding & Fabrication - Gemmells

    That leads directly to better products and a better customer experience. We are committed to being there for our customers, exceeding their expectations for quality and turn-around time. With expanded capacity (we can run our machines 24/7), we provide a full spectrum of welding, laser cutting & fabrication services.. 8989. YRS EXPERIENCE. 8989.

    Get Price
  • Strongest Brand Of Black Label Steel Crushers

    Steel Crushers Reviews - SupplementReviews.com. Categories. Brands.Steel Crushers is a Prohormone manufactured by PS Black Label. It is a synthetic version of hormones or hormone precursors that increase muscle strength, size and stamina, and can additionally aid in fat loss.

    Get Price
  • The Fabricator - Metal Fabricating News, Products ...

    The Fabricator provides metal fabrication professionals with market news, the industry's best articles, product news, and conference information from the Fabricators & Manufacturers Association, Intl.

    Get Price
  • Scaffold Board Shelf Brackets Heavy Duty Industrial

    Scaffold Board Shelf Brackets Heavy Duty Industrial Rustic Handmade . Having a combined excess of 40 years+ in steel fabrication and woodworking our handmade heavy duty scaffold board shelf brackets are made using 6mm x 40mm steel flat bar.

    Get Price
  • HDP PLASMA - Heavy-Duty High-definition Plasma -

    The original method was invented by Sir John Herschel in 1842, and it produced white lines on a blue background. The light-sensitive paper turns blue because of a chemical reaction, and it left the corresponding drawing as white lines. The diazotype method was invented in the early 1940’s, and it left blue lines on a white background.

    Get Price