Using a 2% oxalic acid presoak on arches watercolor hot press for kallitype I was able to get good and sharp results. Without the presoak the paper just did not do well. Though the presoak helped, the print is a little blotchy. The blothchyness may be due to the pot. dichromate. I soaked the paper for 2 minutes. Could I have soaked the paper too long, where the oxalic acid affects the sizing and causes the blotchyness? Curious how long others presoak when they do so? And could the presoak be effective with a 1% solution vs the 2%.