I recently tried my hand at floating lures...using Alumilite White and Microballoons. So my first casting was a disaster as I thought mixing half the balloons with part A and half with part B would be the best method. Wrong! I wanted a high floater so I added approximately 100% balloons and then attempted to mix. This method really did not work very well as I could not tell when it was completely mixed and it got hot fast, so I poured prematurely and the parts came out sticky. After that I mixed A and B separately and then added the balloons. As I as stirring it to completeness, it solidified in the container, probably after only 90 seconds. I worked as fast as I could. Any suggestions would be appreciated!
Sorry for the confusion ... the best way which will give you plenty of time is (I'm going to throw in some actual numbers so we know we are talking the same percentages):
Measure and mix 2 of A side + 2 oz of Microballoons (will net just under 4 fluid oz) Measure and mix 2 of B side + 2 oz of Microballoons (will once again net just under 4 fl oz) Once both are completely mixed, pour the B side into the A ... scrape the B side out as good as you can and start mixing (these will mix together pretty easily as they are both similar consistency) Mix for 30 seconds ... scrape the sides, scrape the bottom, scrape off your stick, do a quick mix again and POUR (this allows you the full open time of mixing after the microballoons have already been thoroughly mixed in)
One Note: make sure your pour hole on your mold is big enough to accept the material into the mold quickly. Molds with small pour holes and no vents do not allow the air to escape when the thicker viscosity fills the entire pour hole. So just make sure you are able to pour the mixed material into the mold quickly even though the consistency is thicker than straight resin.