Absorbent 40 ~
Permeability 500 ~~ of 2000ml/min
Weight of 60 ~
pH of 4.5 to 5.5
Dust is not allowed Sizes Of Flags
Flower paper base abroad, the entire department softwood pulp manufacturing, which accounted for 50% of chemical pulp, mechanical pulp (50%). This paper Desiccant. Ink desiccant adding about 5 to 8 percent of the total ink, plus easy to dry, plus much affect the adhesion of the ink. Beach Flags For Sale
(4) the quality of screen signage requirements. The text of the silk screen signs, scale, graphics, positioning holes and color should be consistent with the requirements of the drawings, the finished surface should be no obvious scratches, stains, ink film adhesion shall meet the requirements.
Phosphate primer in the metal screen
Metal silk screen material is black or non-ferrous metals such as steel, iron, copper. Such as aluminum, zinc, and their common feature is the surface easy to rust or oxidation, Beach Flags For Sale and the surface is relatively smooth, which can easily lead to poor adhesion of screen inks and metals, as well as peel off. To solve this problem, a series of pre-treatment (rust, cleaning, phosphating, passivation, etc.) must be not only a lot of manpower and materials, and to extend the duration. This book presents an easy way, before printed silk, coated with a layer of etch primer on the metal surface, not only can greatly simplify the process of pre-treatment, and to enhance ink adhesion. The etch primer, also known as a wash primer, polyvinyl small hard resin and phosphoric acid, zinc chrome yellow, alcohols such as modulation by an advanced anti-rust paint. It is divided into one component and two-component two (also known as single liquid-liquid type), single component etch primer preparation; two-component etch primer market the sale of goods.
A. Single component etch primer. Beach Flags For Sale
① formula: Custom Flag Maker
Material Name Percentage (%) Weight (g)
Polyvinyl acetal plastic 10.95 176.05
33.3% chromic acid solution 1.40 22.51
10% phosphoric acid solution in acetone 10.95 176.05
Ethanol 62.20 1000.00
Butanol 14.50 233.12
② Preparation method: with an appropriate amount of alumina, add twice as much distilled water Stir lead-acid aqueous solution is 33.3%, spare. Promotional Flag Makers
With an appropriate amount of phosphoric acid, dissolved in nine times the acetone solution is 10% phosphoric acid solution in acetone, spare.
The formula proportion of ethanol, butanol mixed, add the polyvinyl acetal plastic Stir to make it fully dissolved, and then added to the chromic acid aqueous solution and phosphoric acid in acetone solution, Stir can be used.
Two. Two-component etch primer.
① phosphating paint liquid formula:
Material Name Weight (g) Beach Flags For Sale
Polyvinyl butyral 9
Basic chromate of zinc (zinc chrome yellow) 8.625
Positive butanol 20.125
② acidic phosphating solution:
Orthophosphoric acid (85% phosphoric acid) 4.5
Water (distilled water) 2.188
③ Thinner: Promotional Flags China
90% of the ethanol industry (more than 96% alcohol)
The two components of the two-component etch primer is stored separately custody. Phosphate liquid paint can be put into metal containers (iron), the phosphating solution is required into the non-metallic container (plastic bucket). Use liquid paint, phosphating solution ratio of 4:1 is now against the 80% liquid paint phosphating solution of 20% (by weight), stir and place half an hour, allowed to fully reflect and then use . According to how much of the construction volume against time run out, or leftover paint expire after 12 hours, resulting in waste. Use, such as with a good etch primer is too thick, Beach Flags For Sale can not change the ratio of the two, you can add some thinner, thinner can also be used as cleaning tools and containers.