For proper dry mounting, there are 4 critical factors that you have to control:
1. Time
2. Temperature
3. Pressure
4. Moisture

After the mounting is performed, the cool down is also a critical aspect especially for removable tissues that bond as they cool. An ideal cool down press can be created with a 1/4 thick tempered plate glass and a wooden workbench. Screw a piece of 1x2 wood to the back surface of the bench to keep the glass from sliding off the back. Position the wood strip so that the front of the glass protrudes off the front of the bench by about 1 inch so you can easily lift the glass with your hands.

Cheers,
Mark