Is this ok for pcbs? normally i don't care about cosmetics, but if i make a board for someone else how can i clean it? ipa?

I use it for cellphone PCB soldering..I have also used it on a prototype board..it has a low melting point It gives a good finish..& cleans easily.. You can use Mg chemicals 99.9% alcohol to clean..or ABRO contact cleaner..or WD40 contact cleaner..FLUX is also easily cleaned by warming the board up a little and then use the alcohol with a brush to clean..

I see different 63/37 kester types of solder. what is diff. between rosin core (i know what this is), organic core, no-flux core?

Just so you know "Water Soluble" flux is highly corrosive... You might think it's safe as it's called organic/water soluble, but it will strip you tin within hours if you don't completely clean it. This solder is an "RMA" solder or "Rosin Mildly Activated" it is a very safe flux that doesn't require post clean, though your surface to be solder must also be very clean as it doesn't have much in the way of cleaning action.

what is the melting temperature of this solder?

* Melting Range: 361º F, 183º C

Is this solder multicore ?

Multicore Solder is a different manufacture, this is Kester Solder, all the same

Kester 24 6337 8800 50 Activated Rosin Cored Wire Solder

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Description

⚡ Solder Smarter, Not Harder — Join the Pro League!

NO CLEAN FLUX TECHNOLOGY - Leaves non-corrosive, non-conductive residues—skip the cleaning step and save time.
ULTRA FINE 0 031 DIAMETER WIRE - Perfect for detailed electronic soldering with superior control and accuracy.
PRECISION ALLOY FOR RELIABLE JOINTS - 63% tin and 37% lead blend ensures optimal conductivity and mechanical strength.
MADE IN THE USA WITH TRUSTED QUALITY - Manufactured domestically to meet rigorous industrial standards.
INDUSTRY FAVORITE WITH PROVEN PERFORMANCE - Ranked #78 in solder, trusted by professionals worldwide.

The Kester 24-6337-8800 solder roll features a 63/37 tin-lead alloy with a 0.031" diameter wire, activated with 245 no-clean rosin flux. Designed for efficient, reliable electronic soldering, it leaves non-corrosive residues that require no cleaning, making it a top choice for professionals seeking precision and convenience.

Specifications

ASIN	B00068IJOU
Best Sellers Rank	#37,892 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #78 in Solder
Date First Available	September 27, 2013
Is Discontinued By Manufacturer	No
Item Weight	1 pounds
Item model number	24-6337-8800
Manufacturer	Kester
National Stock Number	3439-01-509-4430
Product Dimensions	2.5 x 2.5 x 2.25 inches

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