To explain this phenomenon, it should be considered from the composition of purple ink. If the colorant in the violet ink is a methyl violet material, the ink will fade after being printed under sunlight. The reason is that the photochemical reaction between sunlight and the colorant molecules destroys the chromophoric groups of the colorant molecules in the ink (the chromophoric group is the coloring group of the colorant).
In addition, the purple colorants containing methyl groups have poor chemical resistance, and these colorant molecules can react chemically with nitrocellulose resins and alkali metals in aqueous inks, resulting in discoloration or discoloration of the ink color.
There is a stable pigment in the purple pigment called carbazole violet. It has high chemical resistance and is not easy to fade. However, the pigment is very expensive, so it is still purple in the purple ink. It is widely used. (Author: Wang Shouhong)
Meili cloud Color Paper products mainly Color Offset Paper,
Color Copy Paper, business paper, color paper, pearlescent embossed original
paper and other categories. The product stock is sufficient, the color system is
complete, the product quality is stable, the supply continues.
Color offset
paper, color Copy Paper : currently there are 27 colors: ivory white, eggshell
yellow, beihuang, light yellow, light yellow 1, light yellow 2, lemon yellow,
golden yellow, orange, orange red, light green, green, emerald green, parakeet
green, green-10, dark green, pink, pink, pink, peach red, big red, coffee, light
purple, purple, purple, violet, light blue, Lake orchid, precious blue; The
production machine is 1760 mm paper machine, the weight range is: 70-150g; Main
specifications: 787 * 1092mm, 850 * 1194mm, 889 * 1194mm, 846mm and 850mm.
Special specifications and special color products can be provided to customers
according to schedule. This kind of product is widely used in printing,
advertising, trademark, propaganda, chronology and office consumables.
General business paper has 18 colors, namely: ivory white, beige, light yellow, light green, light blue, pink, lemon yellow, pink, pink, peach red, emerald green, orange, Lake blue, big red, gold, purple, green, light yellow 1, light yellow 2; The production machine is 1760 mm paper machine, the weight is 75g, the main specification is 770 mm drum, also can provide the special regulation and the special color product to the customer according to our company arrangement plan. This kind of product is widely used in making notes, posters, notes and so on.
Fluorescent commercial paper is the special paper for commercial paper, which is divided into pink, pink, orange, yellow and green. The machine is 1760 mm paper machine with 75g weight and 4 specifications 620 mm, 770 mm, 775 mm and 927 mm. Mainly used for messages, memos, classifications, notes, tips, tags, indexes.
At present, there are 12 colors of pearlescent embossed paper: pink, purple,
red, silver and white.
Milk white, platinum, light yellow, eggshell yellow,
golden yellow, gold copper, black and coffee color, production machine for
1760mm long screen multi-cylinder paper machine, weight range of 95-115g;
Specifications are 791 mm and 893mm rolls, which are mainly used for high-end
printing and deep processing.
The Color Card paper is the company adopts the whole wood pulp, uses the pulp dyeing technology, in the pulp pulp pulping section to add the dye, makes the color evenly distributes in the pulp fiber, by the round net paper machine copied and made the special paper, the paper produces the paper has the characteristic of uniform dyeing, the tone downy and generous, the paper color bright, the positive and negative color difference is small, the tensile strength is good, very good, the side does not explode. Color card paper is mainly used to make printing, packaging, paper case, cover, card and so on. Production machine 1760mm circular machine, range 150-400g, commonly used specifications: 787 * 1092, 850 * 1194, 889 * 1194, tube 787 mm and 889 mm. Color mainly black, big red, Gentry blue, deep blue, Lake blue, coffee, light grey, gray, grass green, deep green, dark green, dark green, hot powder, light purple, purple, lemon yellow, Golden gold, orange red, cream yellow, light yellow, light powder, pink, light blue, light green, can also be produced according to customer's needs.
Color Paper
Color Paper,Color Offset Papers,Color Copy Papers,Good Performance Color Paper
Mcc Meili Cloud Computing Industry Investment Co., Ltd. , http://www.mcc-offsetpaper.com