Many people tend to think it's the leather absorbing the edge paint, but I once tried edge painting the side of a piece of glass 5mm wide and the same effect was there with the line down the middle.
My theory is that the edge paint is thinner at the edges than the centre, so naturally it will dry faster at the edges and shrink first, thereby pulling away from the centre.
Whatever the actual reason, it is exacerbated by two factors, speed of drying and thickness of paint. To lessen the effect use thinner layers between coats and avoid hot or dry environments (air-con). The same goes for force drying with heaters or fans.
Cold damp UK winters are great for edge finishing if you like drinking lots of tea between coats, and you own an umbrella to go and get more tea because the first coat still hasn't dried yet.. (saying that, it's 100.4F and dry today!)
thanks for the help
Many people tend to think it's the leather absorbing the edge paint, but I once tried edge painting the side of a piece of glass 5mm wide and the same effect was there with the line down the middle.
My theory is that the edge paint is thinner at the edges than the centre, so naturally it will dry faster at the edges and shrink first, thereby pulling away from the centre.
Whatever the actual reason, it is exacerbated by two factors, speed of drying and thickness of paint. To lessen the effect use thinner layers between coats and avoid hot or dry environments (air-con). The same goes for force drying with heaters or fans.
Cold damp UK winters are great for edge finishing if you like drinking lots of tea between coats, and you own an umbrella to go and get more tea because the first coat still hasn't dried yet.. (saying that, it's 100.4F and dry today!)