Differences

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--- equipment:handling [2012/02/11 22:30] – [ProKit] mcmaster
+++ equipment:handling [2013/11/10 23:10] (current) – mcmaster
@@ Line 16: / Line 16: @@
 WARNING: these are epoxy / resin filled.  Do not expect them to be resistant to acids and be wary of acetone.  (as I realized the hard way...)
+Trim brand Carbon Tip Pointed Tweezers are an inexpensive brand intended for hair removal.  They don't have a sharp tip but work well enough for general handling.  I got them when they were cheap on eBay but still can be found around ([[http://www.ixir.co.uk/products/Trim-Carbon-Tip-Pointed-Eyebrow-Tweezers.html|example]])
+  * $5 each + $5 S/H: http://www.amazon.com/Trim-Precision-Deluxe-Carbon-Tweezers/dp/B00BS15UNW
 Advantages
@@ Line 55: / Line 58: @@
   * 93302: the tip is longer than the 93307 but otherwise identical (other than the number)
-tip bottom, 93307 tip top:
+tip top, 93302 tip bottom:
 {{gallery>:mcmaster:tweezers:9330x_tip.jpg}}
@@ Line 77: / Line 80: @@
+====== Tweezers ======
+Tweezers are often useful for several purposes including picking dies out of chemical solutions (acid, acetone), plucking bond wires, and general handling. Each has its own issues that make different kinds of tweezers useful.
+====== General handling ======
+Plastic tweezers are preferred as they tend to cause less damage.
+====== Plucking ======
+Hold the die with those described in "general handling." If you are plucking by knocking wires off, definitely go with plastic. If you are coordinated, metal tweezers are preferred for normal plucking. Otherwise, go with plastic if you think you might slip and hit the die. It won't grip as well and will probably degrade much faster, but will be safer for the die.
+====== Acetone ======
+Useful for pulling dies out of rinse solutions. Some tweezers are resistant, others aren't. Wet a paper towel with acetone and try rubbing the upper area of the tweezers. If plastic comes off, its no go.
+TODO: get a list of some known acetone resistant tweezers.
+====== Nitric acid ======
+Plastic aluminium, or stainless tweezers. Unknown if any plastics react with nitric? If you need to pull it out of hot acid, definitely go with aluminium. Stainless is also pretty resistant to nitric acid.
+====== Sulphuric acid ======
+Plastic (or maybe stainless?) tweezers.