石川工場 Company Profile

On September 11, 2024, we began selling the new product Tiny Plus. It enhances the existing Tiny product by adding a timer function and a rotation speed adjustment feature. 【Features】 - Maintains the basic performance of the Ishikawa-style stirring and grinding machine while achieving the smallest size. - Processing volume is 0.03 liters. - Ideal automatic mortar for researchers and developers who perform grinding tasks manually with a mortar and pestle. - The pestle tube has a built-in spring, allowing for stirring and grinding while applying pressure. - Equipped with a timer, enabling multitasking while grinding. - Features a rotation speed adjustment function, allowing grinding under various conditions. - Includes LED lighting for easy monitoring of processing status. - Designed for easy mobility and storage with a detachable AC cord. - Improved chemical resistance due to the use of a stainless steel casing, expanding its applications in laboratories and clean rooms. - Standardly equipped with an acrylic cover for splash prevention and safe handling. - Its ultra-compact and tabletop design allows for use within fume hoods or glove boxes, making it possible to grind substances containing organic solvents, provided the cover material is appropriately selected.

**Summary** The particle size distribution was measured when glass fragments were crushed using an automatic mortar AGB. After crushing standard microscope slide glass to about 3.5mm, it was further pulverized using the automatic mortar AGB. The crushing time was 5 hours, and the particle size measurement was conducted using a laser diffraction device. **Conclusion** Glass fragments of standard microscope slide glass crushed to about 3.5mm were pulverized using the automatic mortar (Ishikawa-type stirring grinder) AGB. The particle size reached saturation in about 3 hours, achieving a size of approximately 1.7μm. **Testing Equipment** - Testing Equipment - Automatic mortar (Ishikawa-type stirring grinder): AGB - Laser diffraction/scattering particle size distribution measurement device: LA-950V2 (Horiba, Ltd.) *Note: The measurement of particle size distribution was outsourced to an external organization.* **Test Results** When glass fragments of standard microscope slide glass crushed to about 3.5mm were pulverized using the automatic mortar (Ishikawa-type stirring grinder) AGB, the particle size saturated in about 3 hours. The particle size was approximately 1.7μm. Therefore, it is possible to crush glass to a particle size of about 1.7μm using the AGB type.

**Summary** To understand the performance of the Ishikawa-type mixing and grinding machine produced at the Ishikawa factory, zeolite was used as the standard material to clarify the relationship between grinding time and particle size distribution through experiments. First, experiments were conducted using the D18S (desktop machine) to examine the relationship between the particle size distribution of zeolite and grinding time. The grinding times were varied at 15 minutes, 30 minutes, 1 hour, 2 hours, and 4 hours, with 2g samples taken at each interval. These samples were then analyzed for particle size distribution using a laser diffraction particle size measurement device. **Conclusion** In the particle size distribution, the peak value (mode) was 0.4μm for grinding times up to 1 hour. After 2 hours of grinding, it was 0.1μm. The standard deviation, which represents the variation in particle size, decreased with longer grinding times. However, beyond 2 hours, it saturated and remained almost constant at 3μm. From this, it can be concluded that within the experimental range, the relationship between the particle size distribution of zeolite and grinding time using the D18S shows that longer grinding times result in smaller particle size (mode) and less variation (standard deviation), but after 2 hours, it becomes constant.