How to add solids to upper test tube and make greyscale?

Question

Hello I do make the following TeX image greyscale. I would also like to have some black solids in the test tube above the bunsen burner. Currently I have this:

\documentclass[border=3.14mm]{standalone}
\usepackage{pst-labo}
\begin{document}
\psset{unit=0.5cm,substance={\pstBULLES[20]{white}},niveauLiquide1=0}
\pstChauffageTube[barbotage,pince]
\end{document}

Which produces this image (you have to use XeTeX to have it render properly, there are workarounds for using other pdf formats with pstricks but I didn't include it in this code to make it simple):

Here is a annotation of what I want (I also want it to be greyscale).

Answer 1

Certainly not an answer but maybe a starting point. I think it does not show any stuff in the left tube because you set niveauLiquide1 to 0. If you leave it at its default but change the color to white you can add stuff. What remains to be done is to find the right substance. UPDATE: Added an arguably better substance.

\documentclass[border=3.14mm]{standalone}
\usepackage{pst-labo}
\begin{document}
\newpsstyle{aspectLiquideFake}{linestyle=none,fillstyle=solid,fillcolor=white}
\psset{unit=0.5cm,substance={\pstBULLES[50]{gray}}}
\pstChauffageTube[barbotage,pince,substance={\pstGrenailleZinc[80]},aspectLiquide1=aspectLiquideFake]
\end{document}