Dear, Mr. Gonzalez

You need a particular concentration of gelatin at which remain solid at room temperature (It dependents of brand of gelatin) typically 3,5% of agar-agar. and concentration of KCl near of saturation concentration.

This mixture is disolved with boiling temperature and magnetic stirring and dispensed in a U-tube, disposed in vertical position and stored in a fridge for boost de solidification process.  

Regards.

Gustavo G.

Dear Mr. Gutiérrez thanks for your answer. I have been thinking in make my own recipe inspired in my cook experience as, but today I asked to Ms. Zambrano and she disallowed my idea, so I think that I would need a font to cite the recipe. Hearty greetings