at our store, we use yellow and no-shrink pink together. we fill the
mold the same as you do, but we calculate 7 minutes for every layer of
pink, including rubber rolled up and fitted into hollow parts, and
five minutes for every layer of yellow. we make no allowance for
altitude (we’re at 7,580ft above sea level), so if this affects the
vulcanization process, you might want to consider that in your
generally, after the first ten minutes of vulcanizing, we tighten the
squeeze a little more.
of course, there are times where we forget about the mold altogether.
however, when this has happened, it has not affected the mold
hope this helps,