The process you're describing is called "hot-press embedding," where samples are encapsulated through heating and pressurization. This technique finds extensive use in preparing metal materials by melting and bonding resin with the samples under controlled temperature and pressure conditions. This process effectively safeguards the edge integrity and surface flaws of the samples during preparation.

Some embedding machines are equipped with adjustable cooling systems to prevent rapid cooling-induced gaps and enhance edge protection. Post-embedding, the samples maintain consistent sizes and shapes, facilitating subsequent metallographic preparations.