HOW TO MAINTAIN THE PROBLEM OF YELLOW LINES
There are traces of yellow lines on the surface of PVC square tube. This problem is caused by the thick and wide support fusion seam of the inner mold frame.
When the Product is extruded from the model, it is scraped by the material which stick to the support seam, so there is yellow lines.
To deal with this kind of imprints, firstly disassemble the mold. Then, grind the support seams with sanding tools to achieve perfect performance
