Here at 4THIRDS we are not sure who it was that first "invented" using PVA for Fishing but we understand it was with the help of Richard Gardener that it was first commercially for sale specifically for fishing. If anyone knows for sure, please let us know as we would be interested in hearing. This was around the early 1980`s and is has been refined and perfected a lot since. I think it is fair to say that the early PVA available was far from what is available from us today and PVA bags made from this regularly stuck together and wasn't so easy to use.
Back in the 1980`s carp fishing information was more secretly kept by those in the know and often new developments or bait ingredients were given code names to make it harder for those that didn't know about the development to find out. PVA is no different.
PVA is more commonly known as the white glue you find in schools (Poly Vinyl Acetate) and not the Poly Vinyl Alcohol (PVOH) that is used in fishing.
For those that didnt know this information it led many people up the wrong path trying to find out about it.
Back to the present and PVA is now available in many forms including PVA Bags, PVA String, PVA Mesh and PVA Tape.
These are all basically variations on 2 forms, PVA string, and PVA film.
PVA string is used to make the PVA mesh and PVA film makes the PVA Tape and PVA Bags. Both of these come from processing the PVA plastic in different ways.
There is a fine balance for PVA between thickness and solubility. The thicker the PVA the longer it takes to dissolve, and this balance is very important in Carp Fishing. If you have a very thick bag for example it will not dissolve within a reasonable amount of time and will not be suitable for use. Conversely if the bag is too thin it will dissolve before the bag has even reached the bottom of the lake. This is one of the biggest problems to overcome and something we spent a long time researching to find the right balance.
The next problem to overcome is the bags sticking together. This was one of the biggest problems with early PVA Bags on the market. 20 years later and we now use a textured PVA material to overcome this. This has many advantages as they never stick together unless made wet, this same textured PVA has amazing tensile strength. One little trick to try with our bags is to try to break the bag pulling from the top and bottom with your hands alone.
PVA string is made from spinning the plastic into a thread, again the thicker the string the longer it takes to dissolve.
We hope this little introduction has been useful, we are always interested in your comments and will revise all of our articles.