Karina, are you using a string like embrodery thread or close to it? If so and you are beading with glass beads the beads will eventually cut the string. I have used the beading wire, but then you ahve to mess with the crimps to keep it together. I have also used fishing string like an 8-12 Lb test. Just tie it and use some jewlery glue on it and run the ends though a few beads and cut.
I need to take some pics of my things and get them on my pc so I can post them. My fiancee's mother is a seamstress and we are in the SCA--Society for Creative Anacronisms and we do reinactments for the Medieval time period. She does the clothing and some leather work belts, pouches. quivers and the sort. Then she decided to venture into jewlery making and took me to a class with her and I like it. Havent made many htings, but the ones I have made I am proud of and think they look nice. Anyway just an idea about the thread and fishing string. They say that Fireline is good for beading.
Krickett