Blender pens can be used to colour stamped images with different mediums, including dye based ink, chalk, watercolour crayons and watercolour pencils. They contain a clear liquid.
When using ink, swipe your stamp pad on a non-porous surface such as a clear plastic stamp case or whatever you have to hand, to leave some of the ink on the slick surface. Pick up some of the ink with your blender pen and add to the stamped image.
When using chalk, pick up the colour straight from the chalk square and apply to your image. The liquid in the blender pen will help set the chalk.
When using crayons, you can either pick up colour from the end of the crayon and apply to your image, or colour in the edges of your image with the crayon and then use the blender pen to drag the colour inwards.
With watercolour pencils, it’s easier to colour in the edges of your image with the pencils and then use the blender pen to drag the colour inwards and blend colours together.
The card I posted yesterday was coloured using a blender pen and ink.