Just replace the unused part of the board back in the lightproof
envelope and fold over and tape the flap. I have unused board portions
which I have stored for over 2 years before using the rest of the
board and have had no problems.
Just replace the unused part of the board back in the lightproof
envelope and fold over and tape the flap. I have unused board portions
which I have stored for over 2 years before using the rest of the
board and have had no problems.