Blueprints, commonly known as "blueprints", is a kind of chemical coating processing paper, which is specially used for various engineering design and mechanical manufacturing blueprints. It is an essential article in production, scientific research and construction.
The blue building engineering drawing is a large-scale drawing method formed in the era of no computer drawing.
The drafter draws the picture with a carbon pen on a transparent paper called "sulfuric acid paper". Slide show is as like as two peas.
The blue color on the drawing is the working principle of the ammonia water fixing photosensitive machine, which has no other significance.
Architectural electrical design specification, design specification, design process and drawing specification (from map reading to mastery, 27 documents in total)
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1. Teach you how to understand the drawings; 2. Architectural electrical professional drawing; 3. Electrical design process and content; 4. Electrical design assignment; 5. Electrical drawing and drawing; 6. Electrical drawing specification; 7. Lighting electrical design; 8. Basic course courseware of electrical knowledge (entry level); 9. Architectural electrical lighting design; 10. Summary of basic knowledge of Architectural Electrical Design; 11. Basic knowledge of electrical design; 12 Brief introduction of complete set of electrical principles and components; 13. Basic electrical knowledge; 14. Design of electrical control circuit and components selection; 15. Key points of electrical drawing review; 16. Design of lighting and distribution system diagram for building electrical engineering drawing; 17. Reading of building electrical construction drawing; 18. Calculation method of electrical design load; 19 Refer to table for utilization coefficient of electrical design demand coefficient, power factor and other coefficients; 20. Common faults in violation of rules and standards encountered in electrical drawing review; 21. Drawing specification and electrical drawing of electrical drawing; 22. Reading of electrical schematic drawing; 23. Detailed explanation of electrical schematic drawing; 24. Common faults in design quality of electrical discipline; 25. Construction organization design of electrical engineering of reconstruction project; 26. Electrical design of high voltage switchgear; 27 Building electrical design, power supply system and electrical diagram
At present, the drafters can complete the drawing of all kinds of structural drawings by using CAD instead of hand drawing. At the same time, when drawing, they can use a large-scale plotter like a printer to print the drawings in the computer on the white paper or in color.
However, in order to copy a large number of the same drawing, designers are still using the old "print method". The cost of this method is very low. The cost of printing an A1 size drawing into a blueprint is about 0.80 yuan. And it's very efficient. It takes only a few seconds for an A1 size drawing to be printed.
If you don't want to be very blue, you can slow down the printing time; otherwise, the printing time will be faster and bluer.
Show the slide machine
Blue paper is also called blueprint paper. Diazonium salt is just like blueprint paper or diazonium sensitive paper. A kind of processing paper, which is made of blueprint base paper and then coated with photosensitizer to dry base paper, is roll paper.
The base paper is required to have good wet tensile strength and absorption performance, with little wet deformation and no chemicals affecting the performance of the sensing materials. It is usually made from cotton pulp or bleached wood pulp on the paper machine. The blue drawing made of qualified base paper has the characteristics of flat paper surface, uniform coating of photosensitive layer, no white spots, spots, drug stains, wrinkles, etc.
The use methods of drying drawings are as follows:
1. Wet drying, that is, water washing and drying, that is, iron salt drawings, the photoreduction of which is water washing, some units still use this method.
2. Dry drying, i.e. diazo addition drying, or ammonia fumigation drying, is used for light-sensitive reduction, which is supplied domestically.
3. There are two kinds of semi wet drying drawings, one is to apply photosensitive agent and reducing agent on the paper, while photosensitive side couple to synthesize the drawing, which is not available in China; the other is used for dry drying, when printing, the ammonia water is evaporated to form a fog, so that it can be dried while forming the drawing.
From the line color, there are:
1. Blue line on white background, white line on blue background, brown line on white background, and wet drying drawings.
2. Blue background purple line, white background brown line and white background black line are used to dry drawings. At present, most of them are blue and purple lines, and some areas have blue lines or black lines with white background.
From the coated surface: there are two kinds of single-sided coating and double-sided coating:
1. One side coating has two meanings: one is to only apply photosensitive solution on the used paper; the other is to apply photosensitive agent on one side and borate water on the other side, so as to eliminate paper warpage and improve storage period. In fact, two sides coating, because only one side is photosensitive, is also known as one side coating shoes, which is widely used in China.
2. Double side coating is both sides are coated with photosensitive agent, both sides can print, mainly to reduce the volume of information and save paper. At present, there are 19 places in China, such as Shanghai, Beijing, Tianjin, Hangzhou, Nanjing, Wuhan, etc., where the development direction in recent years is white background blue line and double-sided coating, because the blue line blueline blueline blueline blueline blueline blueline blueline blueline blueline blueline blueline blueline blueline blueline blueline blueline blueline blueline blueline blueline blueline blueline blueline blueline blueline blueline blueline blueline blueline blueline blueline blueline blueline blueline blueline blueline blueline blue.
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