By its very nature, vitamin A causes drying of the skin and exfoliation. A bevy of prescription and OTC vitamin A topical preparations make use of this side effect to treat a variety of skin concerns. The term Retinoid refers to any Vitamin A based molecule. It's a category, similar to saying antibiotic. They may be related, but some are stronger and more effective than others.
Pototype sheets for Weld Quality Workmanship Standard. Undercut. Definition: A groove cut at the toe of the weld by the welding arc and left. unfilled. Depth of undercut shall not exceed 1/32.
Appreciate advice on how to avoid undercut. I practised on some plate first to get the settings then went up 1 notch on voltage and a bit on wire speed as I figured a 90ish deg fillet with 2 pieces of metal of similar thickness to the plate would need the extra amps. Here is a pic. Welderpaul, Oct 18, 2009.