Talk:Rosin
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Pine resin, heated, ranges to black. That reminds me a lot about tarmaking (spruce, burned in a certain way, tar caught). The connection is not made here, thnough.
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[edit] sealing wax
Rosin is an ingredient in printing inks, varnishes, glues, medicines, chewing gum, soap, paper sizing, and, in past times, sealing wax.
Why "in past times"? Sealing wax still exists, and Wikipedia says shellac and resin have replaced wax and turpentine. Flapdragon 17:03, 27 July 2005 (UTC)
"some is semi-fluid at the temperature of boiling water, while others melt at 100 to 120 degrees celcius." Isn't the temperature of boiling water 100 degrees celcius?
Rosin is a non-crystalline, glassy material and strictly speaking, doesn't "melt". Instead, it gets increasingly softer with more of a tendency to flow with increasing temperature. Rosin typically has a softening point of around 75-80C.
I qualified "melting point" to read "practical melting point" in the Properties section for this reason. Also, I changed the double bass rosin section to say that such rosin will show "evidence of flow" if left for several months. As far as I understand, rosin will not just "melt" (i.e. lose its viscosity) if just left there. Vigormaster (talk) 20:53, 5 May 2008 (UTC)
[edit] price of rosin
Dear editors: I'm a concert classical violinist (proof available upon request). There are NO rosins that cost $100s. Most expensive rosin for violin is Gold 1 by Liebenzeller Metal-Kolophonium. It costs about $25. String Rosins are available in Dark (soft, sticky compound for more friction, used on cellos and string bass) and lighter varieties (dry, less sticky, for violin etc.) However many Rosins are in between, and string players have different preferences as well.
- What the poster above writes is true; I teach viola & violin for a living and I raise my eyes at a cake of rosin costing $20.00. Usually $10.00 is more than enough to buy new rosin for bowed string instruments. Unless there's a steep spike in US inflation, I can't imagine that any of the other uses listed in the article require rosin costing hundreds of dollars either..... J Lorraine 08:44, 26 September 2006 (UTC)
Someone just added a 'citation needed' to the end of the comments about rosin prices. Is it even possible to find a publication to cite for prices of rosin (that isn't a primary source)? Perhaps price should not be in an encyclopedia. Is Wikipedia the right place for a how-to guide on not getting screwed when you buy rosin? J Lorraine 08:10, 26 October 2006 (UTC)
- I was being generous in not just removing it; it's unsourced and contentious, so if you feel it's unwarranted then please go ahead and remove it. Chris Cunningham 15:11, 26 October 2006 (UTC)
[edit] Increase Grip?
"Gymnasts, weight lifters, and baseball pitchers use a bag of powdered rosin to keep their hands dry and to increase their grip." Isn't chalk usually used for this? Isn't the primary problem sweat on the hands and not skin–metal friction? I'm very dubious of this claim. Can anyone provide a citation? —BenFrantzDale 04:58, 12 January 2006 (UTC)
- I'd be dubious too. Powdered rosin is very sticky stuff and would tend to glue the hands to the metal, making it difficult to slide along a bar or shift one's grip on a set of weights. I believe climbers use magnesium carbonate powder rather than ordinary chalk incidentally, perhaps it's the same with the gymnasts, weight lifters, and baseball pitchers. Flapdragon 23:46, 12 January 2006 (UTC)
- Sure enough the Wikipedia entry for magnesium carbonate says it's used used in gymnastics, weightlifting and climbing. Deleted the relevant sentence on the balance of probabilities. Flapdragon 23:54, 12 January 2006 (UTC)
- The sentence deletion is inappropriate, so I'm reverting the edit, and adding some easily found web references. Powdered resin is used for adding grip in many sports, see Mueller's 2006/7 catalogue, which shows that 4 out of 10 of their "grip enhancing" products for sport consist of rosin or resin (is the difference any more than pure semantics?). There are a number of suppliers of resin/rosin bags for sportsmen, and a walk through a well-supplied sports shop would show this. MgCO3 is used to decrease friction, caused by wet hands, a rather different thing from what the resin powder does. Resin powder is permissible under the rules of baseball to dry the hands, but not for putting on the ball. In bowling rosin/resin powder is often used to help with ball control. The makers of a well-known form of resin dispenser say: "Squash, tennis, table tennis badminton, baseball, golf, hockey and lacrosse are perhaps the sports most identified ... but it is also used with equal effectiveness by pole vaulters, discus throwers, basketball players, rugby players, netball players, weight-lifters and gymnasts." --Seejyb 19:20, 30 August 2006 (UTC)
I don't know if any athletes currently (2006) actually use rosin, but I do know for sure that it was sold for such uses. I have an old 6 ounce can of Cramer's Powdered Rosin Mixture, mfg. by The Cramer Chemical Co., Gardner, Kansas. The can says:
- FOR SLIPPERY PLAYING FLOORS
- ABSORBS OIL, GREASE, SWEAT
- Standard for all athletic and gym uses.
- Harmless to rubber and leather.
- To Reduce Slip on Shoes, Mats, Hands.
- Keep a can of Powdered Rosin Mix, in each game kit -- for all sports.
- Sprinkle on floor by players' bench.
- Use liberally on soles of shoes.
- Available in Rosin Bags, too! A Standard in Big-League Baseball / Suitable For All Sports
69.87.200.3 12:25, 3 November 2006 (UTC)
[edit] Excellent article
Great article! Very informative and gave all the information I wanted. Well done. NaySay 18:12, 26 June 2007 (UTC)
