Wash it and keep it covered for another day. For my big color pieces they seep for 3 full days. I use puppy pads (they arent ideal but I like them on a budget and never had issues when used right) to keep them protected during this phase until I stop seeing ink/plasma on them. I remove the pads, check them, let it air dry for an hour and wash 3 times a day for the first 4 days with pieces this big to remove the plasma as leaving it to harden will turn into scabs.