1. Inventory Unification: changes items in your inventory every so often
2. Crafting Unification: changes items that enter a Gregtech block only
The first impacts you all the time, and sometimes it's useful to have it off if items are being improperly converted while you're holding them.
The second only impacts items that enter Gregtech blocks, which you can easily avoid on purpose if you want to keep an item the same in your inventory.
You'll need to set special unification targets for those things which aren't crafted into the right version (using unification.cfg) Unfortunately, I'm not entirely familiar with this section, so you'll need to experiment setting things to true.
This root of this problem is often a result of mod authors not conforming to specific Oredict "standards", which Gregtech relies upon to convert things and represent the materials as a single meta item correctly.
I don't believe there is a config option for plastic sheets. The TPPItweaks mod might have it fixed.
2. Crafting Unification: changes items that enter a Gregtech block only
The first impacts you all the time, and sometimes it's useful to have it off if items are being improperly converted while you're holding them.
The second only impacts items that enter Gregtech blocks, which you can easily avoid on purpose if you want to keep an item the same in your inventory.
You'll need to set special unification targets for those things which aren't crafted into the right version (using unification.cfg) Unfortunately, I'm not entirely familiar with this section, so you'll need to experiment setting things to true.
This root of this problem is often a result of mod authors not conforming to specific Oredict "standards", which Gregtech relies upon to convert things and represent the materials as a single meta item correctly.
I don't believe there is a config option for plastic sheets. The TPPItweaks mod might have it fixed.