Chan operates the printing machine by feeding pieces of paper into the running press, which will stamp the letters on the paper about once every second.
In that time, Chan will pull out the printed sheet and replace it with a fresh piece of paper.
"You need to concentrate or you can get hurt," Chan said.
Once, he broke several of his fingers after failing to move his hand out of the way quickly enough.
True Value
Like most of the waterfront shops in Damnoen Saduak, Charoen Sin is only accessible on foot via a narrow wooden walkway along the canal.
Most of the wooden shophouses are now closed, but there are traces of once-vibrant businesses.
An old sign still hangs in front of what was once a local pharmacy.
A faded logo for Caltex petrol can still be seen on one of the closed shophouses.