[quote=“Randy_Cohen, post:5, topic:8989”]
Do those properties vary sufficiently that a large enough error could result in overfill…[edited][/quote]
Apparently yes. Here are two examples from recent threads:
In this thread a user tried to refill a cartridge with 3rd party resin whose properties were sufficiently different the printer could not fill the tank. Formlabs employee Dmegret described how resin sensing works.
In another thread here a user tried to refill a catridge with a 3rd party resin whose properties were sufficiently different that it caused the printer to overfill the tank and spill.
Light pigments often contain metallic oxides, and blacks often use (inexpensive) carbon. So different colors might exhibit different dialectric properties even if the rest of their ingredients are identical.
BUT that is off topic for this thread.
Addressing @Declan_Halpin’s original question, I’d recommend draining the V1 from the tank/tray and starting fresh with V2 resin. (The machine will ask if you want to re-associate that tray with the V2 resin.) Although a mixture of V1 and V2 might work, it could cause a wide array of problems if their parameters are sufficiently different–including overfilling, spilling, unsuitable laser power, and model defects as a result.
It’s just not worth experimenting when your deadline is only 2 days away!