Matt crawford

Short answer, that's actually two colors. It's called a core shot. The base color, the creme is shot first at a hot temp, then the red is shot immediately after and ran at a lower temperature and pressure to allow for the "fade". Similar to the zoom core shot of red/black on thier trick worms.

I can offer some insight to this, as I work for this company. Here is how it works in a nut shell. The raw plastic is sucked up into the cylinder, and pumped into the "cooker". Depending on the shot weight of the mold, for example, this mold has a shot weight of 1.6lbs of plastic per shot. So, we use a "cooker" that has a total volume of 4.5 lbs. Here is the reason why, after it injects the mold with 1.6 lbs of plastic, it needs a "recover time". This allows for the 1.6 lbs that was taken out to be reheated to around 350 degrees. You would think a 3 lbs, double the weight, would do the trick, but this mold opens roughly every two minutes, so a bigger heat exchanger is required to actually bring the room temp plastic to 350 degrees. The pressure and temperature are set according to the mold size, total cavities, and believe it or not, color.some colors, especially red, tend to run hotter that say a white. I still havent figured that one out and I've been here at southern plastics for 6 years now. Also, the salt and glitter content will give you fits at times as well. These exchangers are pretty basic in design. It has an inlet, and an outlet, the plastic goes in and runs thru channels inside the exchanger which has between 4 and 6 heating elements depending on the size, and out the outlet, thru the nozzle and into the mold. Pretty basic, but gets the job done. Hope this helps.