The main causes of blistering after applying paint on manually applied wood veneer adhesive are as follows:
1. Pressing and ironing time is too short or too early
2. Glue application amount is too low or uneven
3. Oily substances or impurities get into the adhesive
4. The surface layer is a flexible material
5. The veneer application environment temperature is too high, the air is too dry, the air circulation is too fast, the adhesive has already formed a film
6. Initial pressing is incomplete

Solutions to avoid blistering with wood veneer adhesive:
1. When manually pressing and ironing before the wood veneer adhesive has lost water to a certain degree, the moisture in the adhesive cannot properly evaporate, resulting in false adhesion, which is prone to blistering later.
2. When the amount of wood veneer adhesive is too low or uneven, areas with low adhesive quantity are prone to film formation, making blistering likely later.
3. When impurities get into the adhesive, it cannot properly develop strength on the veneer, making blistering likely later.
4. When the veneer material is easily deformed, blistering is likely later, and an adhesive with high initial bonding strength is needed.
5. When there are factors in the environment that cause rapid water evaporation, such as high temperature, low humidity, fast ventilation, the operation pace must be accelerated or the adhesive film formation slowed down, otherwise false adhesion is likely, leading to blistering later.
6. If, during operation, after placing the veneer, adequate pressure is not applied to allow the adhesive to penetrate the veneer, the bonding strength will be low, making blistering likely later. Light rubbing after placing the veneer is needed to facilitate glue penetration.