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In contrast to Direct-to-garment (DTG) printing, in which designs are printed directly onto the garments, DTF employs a two-step process. [citation needed] The fist step in the Direct-to-film (DTF) printing method involves initially printing the design onto a PET (Polyethylene Terephthalate) film and then applying an adhesive powder to the printed film.
Since D2 inks are water-based, they work best for printing on natural fibers such as cotton, bamboo, hemp, and linen. In addition, pre-treatment is typically applied to the garment before printing. The pre-treatment is heat-pressed into the custom t-shirt causing the fibers of the shirt to lay down. [2]
Thermal-transfer printing is done by melting wax within the print heads of a specialized printer. The thermal-transfer print process utilises three main components: a non-movable print head, a carbon ribbon (the ink) and a substrate to be printed, which would typically be paper, synthetics, card or textile materials.
Q is the exchanged heat duty , U is the heat transfer coefficient (watts per kelvin per square meter), A is the exchange area. Note that estimating the heat transfer coefficient may be quite complicated. This holds both for cocurrent flow, where the streams enter from the same end, and for countercurrent flow, where they enter from different ends.
A similar printing method: Direct-To-Film printing (DTF printing) can also make the digital textile printing. The difference from DTG printing is that DTF printing first prints on a special transfer film while DTG printing prints on the substrate. One of the advantage of DTF printing is that it is more cost effective.
Digital textile printing is described as any ink jet based method of printing colorants onto fabric. Most notably, digital textile printing is referred to when identifying either printing smaller designs onto garments (T-shirts, dresses, promotional wear; abbreviated as DTG, which stands for Direct to garment printing) and printing larger designs onto large format rolls of textile.
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