2015年9月29日星期二

How to know sublimation printing?

  Sublimation of an element or compound is a transition from the solid to gas phase with no intermediate liquid stage. Sublimation is an endothermic phase transition that occurs at temperatures and pressures below the triple point.  At normal pressures, most chemical compounds and elements possess three different states at different temperatures. In these cases the transition from the solid to the gaseous state requires an intermediate liquid state. However, for some elements or substances at some pressures the material may pass directly from a solid into the gaseous state. This can occur if the atmospheric pressure exerted on the substance is too low to stop the molecules from escaping from the solid state."
  Sublimation printing is a process where photo quality image, graphic or text is transferred to a various materials such as garments, metal, acrylic and others using heat transfer. There is a specialized sublimation ink that is heated and transfers the photo quality into the material. When gas comes into the contact of polymer fiber, it passes through the turn dye the material. Sublimation process works efficiently for printing almost all types of materials.

  Sublimation inks are designed to work with certain sublimation printers including the Roland Hi-Fi Express FP-740 and the Roland Hi-Fi Jet Pro II FJ-540. The design to be sublimated will be printed in mirror on special sublimation paper such as Beaver TexPrint XP sublimation paper and Beaver TexPrint Tacky sublimation paper. Once the transfer is printed to the sublimation paper the transfer is placed face down on the item being sublimated. A heat press like the Hotronix Auto Open Clam heat press or Geo Knight Maxi Press will be used to achieve the high temperatures needed as well as even firm pressure which will vaporize the sublimation ink, releasing it from the sublimation paper and dyeing the item. Once transferred and after the item cools it is complete and ready to be used. There is no special drying or coating required.

  You have to use a decent quality heat press. An iron can't reach 400 degrees and it won't be able to provide even and heavy pressure. A good heat press for sublimation is the George Knight DK20S heat press. It is a heavy duty heat press for a reasonable price that has the ability to press thicker blanks if you ever want to get into decorating plaques. Be aware that cheap heat presses from abroad don't provide even, accurate heat and most are likely to fall apart in the first year of use.

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