From a comparison of the properties of charcoal from wood charcoal crust with an ordinary ball Niang found charcoal from shells of the ball the ball better with Niang, charcoal, wood, plain. Table: 4.2.1.
A comparison of the properties of the shell briquette charcoal accents on the plain charcoal shell balls Niang has better features than ordinary wood charcoal in Table 4.2.1 below.
From the comparison of the properties of charcoal from the shell djenkol beans with ordinary charcoal charcoal found that อัดแท่ง from shell balls better than ordinary charcoal accent As 4.2.1 table as follows