Since question is not clear two answers can be given on the assumption that the question is about dry soldering. Thoroughly clean the part to be soldered, apply flux re-solder the connection.
The second answer is normally lead will not be kept on a soldering point. the technician doing soldering has to use lead and flux separately.
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There are still solders that contain lead. The European Union prohibited excessive amounts of lead in consumer products (WEEE and RoHS), so there are lead-free solders. But there are industries in which the lead-free solders are not acceptable.
Use lead-free solder, 0.2 percent lead or less. Lead free means NO Lead your better off with a silver bearing alloy as it has a longer pasty range or 95% tin 5% antimoney Actually the term "solder" means lead bearing according to the AWS specifications
Tin and lead make solder.
Lead is toxic to humans (causes brain damage) thus when using a solder to join copper water pipes it is best not to use a solder containing lead as this will get into the water passing through the pipes and slowly poison the user of this water.
A solder is a metal or alloy that has a melting point range of 90 to 450 degrees Celsius (200 to 840 degrees Fahrenheit). The melting point range makes sure that the metal or alloy is easily handled at room temperature, can be melted to join other metallic surfaces when a moderate amount of heat is applied, and returns to a solid state when it cools down to make the joining permanent. Lead has a melting point of 327.46 degrees Celsius (621.43 degrees Fahrenheit) and therefore it can be used as solder. Mercury, however, has a melting point of -38.83 degrees Celsius (-37.89 degrees Fahrenheit) and it is liquid even at room temperature. Therefore it cannot be used as solder because a liquid that does not solidify cannot be expected to join two surfaces permanently.
in January of 2006 the EU mandated lead free electronics.
Use lead-free solder, 0.2 percent lead or less. Lead free means NO Lead your better off with a silver bearing alloy as it has a longer pasty range or 95% tin 5% antimoney Actually the term "solder" means lead bearing according to the AWS specifications
Traditional electronics solder also contains resin.
Tin and lead make solder.
It is a mixture
Yes many types depending on application and lead free alloys as solder by definition means lead. Solder such as 40 - 60 50 -50 60- 40
Easiest way to connect lead to copper /brass is a wiped joint consisting 40 - 60 solder alloy as this gives a longer pasty range
soft solder is made of tin and lead. :D
Solder
lead.
Tin and Lead solder is the most common. The international trend is changing as the EU nations are moving toward non lead based solder.
Lead is toxic to humans (causes brain damage) thus when using a solder to join copper water pipes it is best not to use a solder containing lead as this will get into the water passing through the pipes and slowly poison the user of this water.
Lead free solder found in most plumbing or hardware stores.