In the last three weeks I have gone through more plaster of paris than I did in cub scouts 45 years ago. I have made several molds and have successfully poured some stick baits. When I pour the larger stick baits, (Yum Dinger 7.25 inch), the bait comes out fine with the exception that I get a sink hole (hollow middle) in the last 1-1.5 inches of the bait toward the pour hole.
I must say that not always. Sometimes I get the full bodied bait that I am looking for, but probably 75% of the time I am not satisfied. I am remelting same color plastic worms in the microwave and pouring out of a pyrex cup. This sink hole doesn't seem to happen when I pour the 5 inch Senko style baits.
Am I not heating the plastic long enough and it is cooling down by the time I reach the top of the larger mold? Is using the remelted worms instead of plastisol causing this? Or could this be an air venting problem in the mold itself?
If I have learned anything about this hobby, it is that is is definately a trial and error process. And the wealth of information on this forum is endless. If any of you can guide a newbie in this area, I would certainly appreciate your input.
Pat