c) drying. The drying properties of water-based ink and solvent-based inks compared favorably with the more significant drying effect of temperature and wind. Ink diluted with water, 20 ° C under dry bath time, 3X5 Flags For Sale coated paper, about 6 minutes, vinyl chloride tape about 13 minutes; propylene board about 14 minutes.
② solvent-based inks. Solvents and resins wide range of options, Order Custom Flags so its , suitable for easy to adjust. Is still the screen of inks.
There is also a link material for the uneven nature of oil or plastic, such as plasticizers binders melt ink; mineral oil, oil-based ink binders; vegetable oil for the link material, soybean oil-based ink, this ink is Make sure health for edible ink, gratifying prospects for food screen and food wrapping paper screen .
, Screen ink performance 3X5 Flags For Sale
A. Viscosity. Viscosity, also known as friction is the resistance of the layer of the fluid layer of fluid relative movement. Fluid internal hinder its flow characteristics. The ink viscosity is generally "parked", "cps". Screen ink viscosity between about 4000 to 12,000 cps.
Large ink viscosity is too poor wetting of the substrate, Custom Flags And Poles not easily transferred to the substrates. Causing difficulties, blot the ink.
Viscosity is too small, will cause a blot to expand, resulting in the of the product lines merge to become scrap.
The viscosity index viscometer measurements. 3X5 Flags For Sale
Changes in viscosity and made of the relationship is: ink on the plate, the viscosity is more stable as possible, but transferred to the printed materials, the viscosity becomes larger as soon as possible. Thixotropy is unfavorable to the former, the latter benefit, so appropriately thixotropy is desirable, and shear tone detrimental to the . Custom Flags For Boats
Plus solvent dilution criminal or plasticizers, can reduce the viscosity; added fillers, pigments, silicide, can increase the viscosity.
2, thixotropy. Thixotropy refers to the liquid because of stress to reduce viscosity and then the ability to restore its original viscosity. In the screen process, the performance thickens still some time for the ink viscosity larger, stirring after thinning, the viscosity of the smaller a reversible phenomenon. Because the shape of the ink pigment particles is irregular, the adsorption layer of the link material, but also an irregular ball. Therefore, in the stationary after a certain time, the pigment particles contact or close proximity with each other to attract, obstruct the free movement of the particles, the ink thickens, becomes sticky. However, this temporary structure, was stirred by external forces, and soon to be destroyed, the lifting of the mutual attraction between the particles, the free movement of the particles have been restored, improved mobility, ink thinning, the viscosity decreased. flag makers 3X5 Flags For Sale
Ink thixotropy as small as possible. To eliminate this disadvantage, in before full mixing ink, 3X5 Flags For Sale to make it back to normal, and then carried the .
Pigment particles in the ink more wooden rule, polygonal porous, such as black ink, the thixotropy on. On the contrary, such as the yellow ink, its thixotropic. Link material in the ink, pigments, thixotropy, and vice versa is thixotropic. Other binders on thixotropy, such as polymerization of the ink produced by the vegetable oil, its thixotropy small, 3X5 Flags For Sale to make a link to material such as polymer resin, its thixotropy.