The printing process actually has this

1. The difference between binders

The binder of surface printing ink is mainly polyamide resin, and the binder of non-cooked back printing ink is mainly chlorinated polypropylene.

2. The difference between the solvents used

The solvents used in surface printing inks are mainly xylene and isopropanol. In general, toluene and ethyl acetate are the main solvents for printing inks.

3. The difference in wear resistance

Because polyamide resin has good flexibility and greater elasticity, the added additives make it better and improve its abrasion resistance, and it is firmer in contact with external objects. The chlorinated polypropylene resin of the printing ink resin is particularly rigid and has poor abrasion resistance.

4. The difference between different excipients

Surface printing inks often add dehydrated apples and kiwi fruit acid esters to improve adhesion, increase gloss, and increase viscosity. In printing inks, various pigment dispersants, enhancers, defoamers and other additives are also added.

5. The difference in printing process

The image on the printing plate when the table is printed is a reverse image, after printing, it is a positive image, the image on the inner plate is a positive image, and it is a reverse image after printing. The printing speed of surface printing ink is slow, and the printing speed of back printing ink is faster than that of surface printing.