Gypsum Analysis & Quality Specifications – Mohammad Shaaban Maleki Trading Company
At Mohammad Shaaban Maleki Trading Company, all gypsum products undergo comprehensive quality control and laboratory testing before export. The analysis includes purity level, mineral composition, mechanical strength, initial and final setting time, moisture content, specific gravity, and all relevant technical parameters.
Our raw gypsum stone is sourced from high-grade deposits and processed into two main quality classifications.
Depending on customer requirements, we can manufacture any type of gypsum according to the requested technical analysis.
This includes construction gypsum, base coat gypsum, finishing gypsum, super fine gypsum, export-grade gypsum, mesh sizes 100–200–300, moisture-resistant gypsum, undercoat gypsum, and gypsum tailored for industries such as drywall systems, casting, molds, and more.
This page provides all standard laboratory analyses offered to buyers in different countries, ensuring they are fully informed about the technical specifications before placing an order.
We hereby present the technical analysis and laboratory test results of the export-grade gypsum produced by Mohammad Shaaban Maleki Company.
According to the results, the tested sample shows excellent purity, whiteness, and setting time, fully complying with international quality standards.
It is also noted that the analysis results and stone types represent different quality grades, and our products are supplied in two main quality levels.
Since gypsum is used for various industrial and construction purposes, production is carried out based on the customer’s requested specifications and analysis, ensuring that the product precisely meets the intended application.
These results confirm our commitment to consistent quality and customer satisfaction in both domestic and international markets.
Thank you for your trust and cooperation.
| row | features | The results of test |
| 1 | Caso4.2H2O % | 94.89 |
| 2 | Free water % | 0.02 |
| 3 | Combined water % | 4.13 |
| 4 | Cl % | 0.01 |
| 5 | Na2O % | 0.01 |
| 6 | MgO % | 0.18 |
| 7 | K2O % | 0.01 |
| 8 | SiO2 % | 1.08 |
| 9 | Al2O3 % | 0.19 |
| 10 | Fe2O3 % | 0.17 |
| 11 | CaO % | 38.17 |
| 12 | SO3 % | 55.9 |
| 13 | Residual % | 0.13 |
| 14 | Hardness N/mm^2 | 9.84 |
| 15 | The minimum cohesion strength N/mm^2 | 0.16 |
| 16 | Whiteness | 95.1 |
| 17 | The maximum rate of remaining on the sieve NO 100 percent | 0 |
| 18 | The minimum compressive strength (N/mm^2) | 9.03 |
| 19 | The minimum flexural strength (N/mm^2) | 3.72 |
| 20 | The minimum initial setting time (minute) | 9:35 |
| 21 | The maximum final setting time (minute) | 26:50 |
| 22 | The Amount of Gypsum in 100 cc water (gr) | 115 |