Do You Know What is The Most Important for Heat Transfer Printing?

  Hi,Thank you for your click with my blog.You must know that all of my articles are about the sublimation transfer printing.What is the sublimation? A process of printing synthetic fabrics and other substrates using special, “subliming” dies which turn from a solid into a gas at a specified time, temperature and pressure. Under pressure these dyes in gas form are absorbed and encapsulated with pinpoint accuracy into the substrate. The gas returns to solid form once encapsulated. The result is a permanent print which will not wear off and is washable and with withstand dry-cleaning. And today I will share you the most import three elements when you doing a heat transfer printing.

  There are three integral specifications necessary to achieve optimal heat transfer printing - time, temperature and pressure. All are interrelated to each other during the process, i.e. more time - less temperature; more pressure - less time and vice versa. The relationships are not proportional, but do have an effect on the quality of the print.
1.Time
  The period in which the sublimation transfer paper and substrate is subjected to heat and pressure. On a continuous, rotary drum machine, this is a function of belt speed and the length of the heated area. On a platen style machine such as the Skyimage heat press machine, it is the time that the heads are closed on the machine. Twenty to thirty seconds is a typical range for traditional off-set, screen printed.
  The time variance is dependent on the dye formulation and the substrate to be printed. Forty to forty-five seconds is typical on ink jet printed sublimation paper. On all Skyimage roll to roll heat press machines, the time is automatically set with a dial on the control panel.
2. Pressure
  The process by which the sublimation paper and substrate is uniformly introduced to the heat source of the machine. Pressure requirements are relatively low (2 to 6 psi) but it is critical that the pressure is evenly distributed.
  The Skyimage rotary drum heat transfer machines, including model 7300IJ, apply pressure in a conventional, time-proven method of belt tension applied to the contoured heated surface of a heated drum. This requires a special high temperature belt that has characteristics allowing it to conform evenly and firmly to a curved surface.

3.Temperature
  Traditional sublimation inks used in the apparel and textile industries for the past 30 years have required temperatures in the range of 400°F. These printed products have to perform well in wash and dry-cleaning tests.
  The temperature must be maintained in the range of (+/-) 5° F, or there can be a shade differential in the print. The nature of the heat transfer printing process makes this a fairly complicated specification to control. Heat is constantly withdrawn from the heat source and must be replaced with a control standard of +/- 5° F. As a further complication, the heat is constantly moving toward the outside edges of the heat source with or without substrate withdrawal of heat. Astechnologies pioneered the multi-zone heat control system and was the first manufacturer to provide separate control of the heat across the width of the heated drum to achieve absolute security in temperature variance.
  Always use AIT temperature test strips to verify actual temperatures and calibrate your machinery.
  These above is my share about the elements of the heat transfer .Of course if you have some better suggestions or needs welcome to contact us at any time.We will provide you with the best quality product and the service. Hope this article can be useful to you. Thank you for your reading.




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