you need to shoot grey ones first.....
........then tried to shoot the grey tail section
The gray you are seeing is actually light reflection off the top of the tail flat, the plastics are red and blue.
I think you are injecting way too fast or the blue inserts are not laying tight in the mold.
It almost appears to me that you are hand pouring the blue. If you are, pour the blue hot into the cavities but do not take them out...just leave them in place. When you shoot the red, have it pretty warm but inject it realllllly slow so the incoming plastic doesn't cause lift at the front edge of the blue. Injecting creates a lot of pressure and some molds are almost aerodynamic enough to allow a second color of plastic to suck up under a color alreay in place. Leaving those blue pours in place really helps. This plastic is super sticky when hot, but if you lift the plastic you want to have sealed down tightly, that stickiness, surface tension is what it is, gets broken and 90% of the tackiness will go away and allow these pieces to "float" when the second color goes in.
I have lamination plates all over and yes I use them at times, but in the "fry" series of molds I find hand pouring is quicker and more precise, thus allowing me to laminate maybe 2 or 3 colors before the top color gets shot in. The belly colors are never removed from the cavity. If by chance I muff something up, I pull that belly section and start over or just leave it empty.
I'd bet a nickel that if you heat that second plastic up to 360 and then slow the second color injection down a tad, and hold pressure when the plunger stops for 6 or 8 seconds you'll find the baits come out much cleaner. If you are injecting a plate to get the belly sections or shooting a full bait and snipping to get your inserts you can try allowing them to cool completely before you work with them further. Inserts need to be very firmly re-inserted into the mold and no air spaces can exist under them of problems will jump up. I don't re-move any of my belly sections that I hand pour and seldom have the problem you've shown here. When I shoot a plate for belly sections I leave that portion of the string in the mold and trim the gates using a single edged razor blade so I eliminate the air-under-the-plastic factor.
