Perhaps the primary reason for pre-pressing your garments is to remove moisture – in fact, many of the other reasons follow out from this.
Removing moisture from your t-shirts (or other substrates) is so important. Think of it as priming wooden boards for painting, or having a dress rehearsal before a show. Pre-pressing prepares your surface for the transfer.
It doesn’t matter if you are doing a plastisol, inkjet, sublimation or vinyl transfer. All benefit from a good pre-press. If you are pressing t shirts, they are likely produced overseas. Often coming from Tropical areas, and having been sea-borne, they can have a high moisture content.
This does have a very real effect on how your transfers apply to the surface of your t-shirt. Too much moisture and it’s you print may not last well.
Pre-pressing for 3 to 5 seconds, or longer if you are in an area of higher humidity, will ensure a longer life for your product.
To state the obvious, pre-pressing removes wrinkles from garments!
It’s important that you press on a flat and even surface so that the transfer applies properly. A loss of pressure in some areas due to wrinkles may cause parts of your design to not transfer (if ink) or lift up (if HTV).
Pre-press to ensure you have a perfect flat surface. You owe it to your transfer.
And last but not least, pre pressing help shrink the fabric slightly!
This is especially the case with 100% cotton garments – when heat is applied, there is a little shrinkage. You don’t want this happening when your applying the heat transfers because it will become wrinkled!
How Long To Pre-Press?
Each transfer manufacturer, or transfer paper provider, will have specifications for how long you should pre-press before applying their product.
However, a good rule of thumb is to pre-press for 3 to 5 seconds. Though some people in some places will need to press for 15+ seconds.
The time you pre-press depends a bit on the humidity levels of your area – as alluded to above. If you are in an area of high humidity, like Florida or California then you will probably need to press longer.
Press until you no longer see any steam rising up from your garment – though if this takes longer than 15-20 seconds you may need to put your garments in a dryer first. Pre-pressing longer than 15-20 seconds will run the risk of scorching your garment.
Another idea is to keep a dehumidifier running in your shop or store room. This will help draw the moisture out of your blank/plain garments before it even comes time to press your design in the heat press.
Wood For Heat Transfer
Texprint-r have transfer paper suitable for pressing on wood.
When pressing wood, as with garments, it is essential that it is dry. The key is ink penetration into the wood. This is more likely when the wood is nice and dry. Of course, wood does hold moisture well. It is difficult to dry it out.
Tips for drying out wood:
Leave wooden items in the sun – though watch out for warping in extreme temperatures
Let new wood age for at least a year before putting to use
Leave wooden items for transfer in an area with a dehumidifier
Pre-press wooden items before transfer
Pre Press Garments
Not pre-pressing your fabrics before heat transfer can cause your work to lift, shift or run. It may mean the transfer will not last so long in the wear and wash cycle of life.
First check your manufacturer’s specifications – this applies to the transfer and substrate. Follow their advice. Beyond this, continue to test and try as you work.
To conclude, you really ought to pre-press to ensure an awesome result – it does make a difference!