SANDING & FINISHING
bearings as well as the body of the operator.
Backup pads usually need to be changed out once
a month in high production shops and on machines
running several hours a day. In lower production environments they will often need to be changed every
three to six months. These pads are very low cost and
responsible for doing the most important job in almost every woodworking shop around the country. A
new backup pad is far, far less expensive than reworking entire jobs with swirls and inconsistency. ❮
Source: As a technician for Dixon Abrasives. Adam West analyzes each
step in the sanding process. In his blog series, Adam covers sanding processes
with wide-belt sanders. He can be reached at Adam@dixonabrasives.com.
Read more of Adam’s columns at WoodworkingNetwork.com.
Finishing materials primer
Binders provide coatings with good adhesion, flexibility
and durability. Typical binders include nitrocellulose, alkyd
resins, amino resins, acrylates and polyester resins.
Additives control properties, such as gloss,
consistency, wetting, flow, blister prevention and sandability.
Pigments give finishes hiding power and specific color.
Waterborne materials can be one-pack, two-
Acid-curing systems: The hardener (acid) is a
pack or UV curing systems. Environmentally friendly, they are
available in clear lacquers and pigmented products,
In addition to air drying, curing can be triggered by
chemical reaction. Materials utilizing this system include:
catalyst for curing, and the solvent evaporates and forms
no part of the final film of lacquer, paint or filler.
Polyurethane systems: These are two-pack
systems in which the binder reacts with the hardener.
UV curing systems: Cured by exposure to UV
radiation, the lacquers form a film by cross-linking with
the pre-polymer. Waterborne primers can be used in
combination with UV finishing systems.
Source: AcromaPro, “Facts on Finishing.” For information call
888-277-1448 or visit AcromaPro.com.