Normally, the higher the temperature, the shorter the curing time. Therefore, the amount of curing agent added should be determined by the operating environment temperature. If the curing agent is used too much, the silicone mold will become hard brittle; if the curing agent is added too little, the silicone operation time will be prolonged. If you need to make a perfusion mold, it is recommended to reduce the amount of curing agent extend the glue time of the silicone, so as to make a more refined perfect silicone mold.

1. The amount of curing agent is 1%, the silica gel is still flowing for 2.5 hours, the mold can be demolded in 6-8 hours.

2. The amount of curing agent is 2%, the silica gel will flow in 50 minutes to 1 hour, it can be demoulded in 2 to 3 hours.

3. The amount of curing agent is 3%, the silica gel is still flowing in 28-30 minutes, the mold can be demolded in 1.5-2 hours.

4. The amount of curing agent is 4%, the silica gel is still flowing in 10-15 minutes, the mold can be demolded in 1 to 1.5 hours.

The relationship between curing agent addition ratio temperature:

1. When the temperature is lower than 5°C, the curing reaction of silica gel curing agent will occur.

2. When the temperature is 10℃, the amount of curing agent added should exceed 5%.

3. When the temperature is 25℃, the amount of curing agent added is 2% to 3%.

4. When the temperature is 38-45℃, the amount of curing agent added is 1%.

        Through the analysis of the above situation, the editor of Hongtu recommends partners: the ratio of silica gel to curing agent is at least less than 1%, at most more than 5%. Normally, the ratio is 2 to 3% at a temperature of 20 to 30 ℃. More appropriate. If the curing agent is added too little, it will cure for a long time. Adding too much curing agent will affect the properties of the silicone rubber (hardness, tear strength, tear strength, etc.).

Therefore, it is more appropriate to add 10 grams of curing agent to 500 grams of liquid silica gel.