Making a super simple slip starts with collecting up some of your trimming scraps from your current white bodied clay. You don’t really need much… 300 grams is a good single batch amount to play with for starters. Multiply that by whatever number you might have in mind to experiment with other oxides and stain mixes.
Here comes the fun part… my kids joyously referred to this particular chore as “let’s whack Daddy!” They volunteer for it every time and quite frankly, it’s got me rather nervous, but it’s got to be done so get whackn!
For this chore I use an old pair of blue jeans, (I know you were saving a pair for something like this). Just load up a leg with a manageable amount. You’ll figure out how much is enough pretty quick. Special note, if you pack it too full your crotch will pop… really messy.
Now grab your trusty small hand sledge and just lightly pound the hell out of it. Like I said, my kids think this is hilarious.
At this point I feel I should point out another advantage of using crushed clay to make your mix… it’s a lot easier to get an accurate weight ratio of clay to colorant you’ll need.