Improved genital storage method

An improved method for manufacturing reusable PVC containers for permanent storage in alcohol (ethyl
and glycerol) of preparations of insect genitals, as well as insects themselves, is described.

Well, everything new is a well-forgotten old.
This method was published a long time ago, and even here it was already discussed. Personally, I didn't see any "improvement" in it, except for a couple of differences.
The first concerns the method of heating the end face with a soldering iron instead of a burner. I will express my phi-the burner allows you to really evenly melt the end of the tube and then compress it hermetically. This cannot be done with a soldering iron, and micro-slits are almost always left in the compression site, through which glycerol leaks.
The second recommendation is to seal the open end of the tube with PVA glue. This is also not the best option, since the affinity of PVA with plastics is simply no, and such plugs fly off by themselves as the glue shrinks. If you really want to use something sticky instead of corks, then it is better to use, for example, hot glue or sealants.

Well, everything new is a well-forgotten old.
This method was published a long time ago, and even here it was already discussed. Personally, I didn't see any "improvement" in it, except for a couple of differences.
The first concerns the method of heating the end face with a soldering iron instead of a burner. I will express my phi-the burner allows you to really evenly melt the end of the tube and then compress it hermetically. This cannot be done with a soldering iron, and micro-slits are almost always left in the compression site, through which glycerol leaks.
The second recommendation is to seal the open end of the tube with PVA glue. This is also not the best option, since the affinity of PVA with plastics is simply no, and such plugs fly off by themselves as the glue shrinks. If you really want to use something sticky instead of corks, then it is better to use, for example, hot glue or sealants.

Well, some are not readers, some are writers ))).
This "method" has been described many times, with variations. There is no novelty in it. And the technique itself with gluing and with a soldering iron is the most unsuccessful of all variations. The simplest method is sealing on both sides, and it is also the most reliable. I used it in the 90s, until I discovered micro-samples, which are many times more convenient and safer.

The genitals of butterflies are stored in two versions:
1. on glass in euparal
2. in the micro
-sample, the rest is not quite clear things