Shown are some early Shade printing tools.
Shade printing is one of the most ambidextrous mediums for printing text or pictures onto a surface. Almost any compassionate of surface can be Shade printed, and daily usages carry clothing, posters, labels and signs. Three types of Shade printing inks are commonly used. These inks are UV curable ink, Plastisol ink and water-based ink.
History
The Chinese used a embodiment of Shade printing 2,000 second childhood ago. They false their screens from human hair that was spread out over a wooden frame. The squeegee is passed over the Shade and forces ink over the Shade where the stencil does not block the Shade. The ink is then Dried apricot and the operation is repeated for changed colours.
Types of Ink
When a product is Shade printed, it is passed ended a personal computer that has three basic components: a Shade, a squeegee and ink. A stencil is placed on the Shade to block areas of the picture that achieve not itch to get colour. The Shade and stencil are placed on the information to be printed and then ink is placed on top of the Shade. Japanese craftsmen trumped-up screens from silk, which is where the moderate term for Shade printing--silk screening--comes from. The basic patent for industrial Shade printing was taken outside in 1907 by Samuel Simon. The Selectasine Income, which introduced using multiple colours, was developed encircling the Existence Strife I by John Pilsworth.
Process
UV curable ink is a type of Shade printing ink that does not comprehend solvent that must evaporate during the drying chapter of the formation. UV curable ink is cured using energetic ultra-violet flare that causes the ingredients of the ink to proceed with one another. Plastisol ink is a polyvinyl chloride, or PVC, course that also contains no solvent. Plastisol ink must be cured at high temperatures, around 300 to 330 degrees F. Water-based inks are made up of a dye or pigment suspended in water. The water must evaporate for the dye or pigment to set. Drying is done either at room temperature or using heat, depending on the desired speed of production and the type of ink used.
Advantages
Each of the three types of screen printing inks has its own set of advantages. Advantages of UV curable ink include its quick curing time, color value and inability to dry in the screen. Advantages of Plastisol ink include its inability to dry in the screen, ability to be printed wet on wet, and ability to be used right out of its packaging. Advantages of water-based ink include the lack of film that can be felt on the screen print, its ability to be used in speed printing and its ability to permeate fabric that it is applied to.
Disadvantages
Each type of ink also has its own set of disadvantages. Disadvantages of UV curable ink include its limited outdoor and abrasive durability, inability to print on dark materials, and lack of flexibility. Disadvantages of Plastisol ink include a tendency to melt when overheated, need to be kept clean, and the film that is created on the printed object can be felt with the hand. Disadvantages of water-based inks include the difficulty in curing it and its tendency to dry in the screen if left in the open for a time.
