Is this ideal for jewelry making, ie, placing 2 microscope slides together, foiled, then the application of solder?

It will stick to foil that is not coated with anything

Does the flux residue require cleaning? Or is it no clean?

It can be a little messy, but I don't typically clean it. For hobby projects I leave it there. For professional projects it would be good to clean it.

can this fix jewelry?

Better to find silver solder. This is for electronic stuff.

What is the difference between small and large?

small solder is about 1/16th of an inch in radius(width) and large solder is approx 1/8th inch in radius(width). Small is normally used for light solder jobs Ie: circuit boards,etc. Large is used for heavier jobs that require more solder. Hope it helped.

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Solder Wire 63/37 0.8mm Diameter 0.42oz | in Storage Tube Welding Soldering DIY Works with Flux Rosin Core Tin Lead for Electronics Repair

Product ID: 41144535

📏0.8mm diameter precision wire

🔥Low melting point at 183°C for fast, clean soldering

🧪63% Tin / 37% Lead alloy for optimal conductivity

1778 som

Duties & taxes included

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Sold byAmazon KyrgyzstanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔥 Solder smarter, not harder — precision in every melt!

BRIGHT RELIABLE FINISH - Smooth solder flow with no pull points guarantees strong, lasting connections
POCKET READY PORTABILITY - Compact 0.42oz spool in protective tube fits effortlessly in your toolkit or pocket
FAST MELTING MINIMAL FUSS - Low melting point means quicker work with less heat damage and no toxic fumes
CLEAN EFFICIENT SOLDERING - Rosin core reduces oxidation and rosin splash for spotless, professional joints
PRECISION ALLOY COMPOSITION - 63/37 tin-lead blend ensures superior electrical flow and durability

This 0.8mm diameter solder wire features a 63% tin and 37% lead rosin core alloy with a low melting point of 183°C, delivering clean, efficient soldering with minimal oxidation and spatter. Packaged in a compact 0.42oz protective tube, it’s designed for professionals seeking reliable, portable, and high-performance soldering solutions.

Specifications

ASIN	B01N0VNNKO
Best Sellers Rank	#90,568 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #205 in Solder
Customer Reviews	4.6 4.6 out of 5 stars (2,233)
Date First Available	December 28, 2016
Included Components	plastic storage tube
Item Package Quantity	1
Item Weight	0.4 ounces
Item model number	SW-01
Manufacturer	ICESPRING
Material	Tin Lead
Part Number	SW-01
Product Dimensions	3 x 0.4 x 0.4 inches
Size	Small

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