Prewash - I do this with a white piece of calico in the washer to check they don't run. Then press and stach. I use a fine thread - YLI 60 wt and a 70/10 needle - a bigger needle leaves a hole. I adore working with batiks, I find they behave so nicely compared to regular cotton fabric, due to their higher thread count. Plus both sides are up, so I don't have to worry about that either! LOL Besides that, the same as regular cotton.