reelnmn Posted February 17, 2008 Report Share Posted February 17, 2008 Hey TU Members, it's been a while since I last posted, but am just starting to get back into tackle making. Today, I started to attempt to make a master of my favorite mold by pouring wax into it to get a master. Well it wouldn't release so in fear of breaking the mold I heat the wax to melt it out. In doing so the mold half developed a few heat stress cracks. The mold is still whole, but I don't trust pouring in it, and don't want to risk losing it. My question is how should I go about making a master. The mold is made from some form of plaster, either POP, durham's or something similar, and sealed with envirotex lite. Would the safest route be to make a box around each half of the mold with acrylic, then pour rtv to get a negative of each mold half. Then I can pour RTV or POP over the RTV negatives to get something similar to the original mold. Would this work? Quote Link to comment Share on other sites More sharing options...
nova Posted February 17, 2008 Report Share Posted February 17, 2008 Gather up all the scrap plastic you can find. Form a box around the mold leaving about 1" clearance all around the mold. Then pour the heated plastic all over the mold letting it fill all around it and over it to about 1/2 to 3/4". After the plastic sets up and cools remove it and you will have a negative master of your mold. Then all you do is fill the negative cavity with POP and there you go. www.novalures.com Quote Link to comment Share on other sites More sharing options...
longhorn Posted February 17, 2008 Report Share Posted February 17, 2008 Here's a post that shows a process similar to what nova is describing. http://www.tackleunderground.com/forum/showthread.php?t=10968&highlight=easy+production Quote Link to comment Share on other sites More sharing options...
nova Posted February 17, 2008 Report Share Posted February 17, 2008 Pretty close Longhorn. With my description you wind up with a bigger piece of plastic that actually forms the box for the mold and all you have to do is pour the POP into it. I described it this way because he stated that he was nervous about loosing his mold to heat fracture. By doing it this way he only has to pour one time instead of muliple times increasing the possibilty of fracture. www.novalures.com Quote Link to comment Share on other sites More sharing options...
reelnmn Posted February 17, 2008 Author Report Share Posted February 17, 2008 Thanks for the replies. I did as Nova suggested and poured around the whole mold half. I ended up with pretty good results with the exception of an air bubble in one corner...I should be able to correct this in a POP mold. For those of you who've been a member a while you may remember, this was a Charlie Little's Frog Mold. When the plastic had cooled I noticed the mold had broken completely into three pieces. It all started near the center where charlie left his "stamp" for his molds. The clearance between the bottom of the mold and the bottom of the frog was only 1/8". If you have one of these molds, be very very careful. Quote Link to comment Share on other sites More sharing options...
longhorn Posted February 18, 2008 Report Share Posted February 18, 2008 I didn't read very well...Nova's process is way better...I've got a few molds I'm going to try that on. Quote Link to comment Share on other sites More sharing options...
