The Following Factors Will Effects Heat Press Machine Quality

Does size matter?
 
Firstly, you’ll need to think about what your end game is, i.e., what are you producing and what do you plan to produce. Heat presses range in heat block sizes from around 6”x 8” for a light-use press, right up to oversized 44”x 64” and beyond. Right now, you’re probably considering either a desktop-sized press for apparel or product customization, or a shop-sized press that will allow you to branch out into fabrics, soft-signage and larger scale sublimation.
sublimation calender
The size of heat presses are so many and varied. As a rule, it’s always better to think bigger to allow yourself the ability to expand your product range. However, if you want something strictly for simple customizations of t-shirts and apparel, a large flatbed or calender press can sometimes be counter-productive and you’ll find that a smaller swing-away or clam press for different apparel sizes is actually more efficient. You may find that a couple of these smaller sized heat presses that can be operated by multiple people might be more effective for your production model than one large-format machine.
heat transfer
Consistent heat
 
Heat presses need to be heated to about 400 degrees fahrenheit for sublimation inks to transfer from the paper to the polymer fibers. This transfer has to be smooth and even for the process to work properly and for the image transfer to be consistent from one pressing to the next. Some heat presses may look really high-tech and snazzy, but under-the-cover it may be a different story.
 
Another issue with cheaper heat presses is having too few heater windings (heater coils) in heater blocks or heater windings that are too sparsely placed. This causes cold spots and inconsistent transfer. The more windings a press has, the quicker it will heat up and regain any heat loss between jobs.
heat transfer machine
Consistent pressure
Maintaining consistent pressure during the heat transfer process is extremely important. A quality heat press has a heavy platen that generates enough weighted-pressure for a clean heat transfer without any cold spots. Cheaper models lack the necessary platen weight and struggle to maintain transfer consistency.
 
 
 
 
 
Heat and pressure testing with heat strips
 
If possible, it’s recommended that you test out a heat press for heat and pressure consistency before purchasing. Even a quality press may have warped platens, cracked rubber pads, ineffective heater windings or other issues that can cause cold spots. You can purchase a test kit from Stahls’ or other heat press manufacturers to check pressure and temperature results. These kits contain special paper strips that when placed in the heat press, heated and then pressed, can indicate uneven pressure and inaccurate heat application.
sublimation calender