Custom Manufacturing
Hummel Croton Inc. has been in business since 1913 supplying specialty and custom manufactured chemicals to meet our customer’s demands. We have the capability of meeting government specifications for most of the products in this catalog. We have the capacity to produce pilot plant to truckload quantities of specialty chemicals. We invite your inquires.
Our Production Equipment List includes:
- Glass lined Reactors
- Stainless Steel Reactors
- Stainless Steel and Carbon Steel Blenders
- Vacuum Drying Equipment
- Stainless Steel Tray Driers
- Stainless Steel Milling and Grinding Equipment
- Stainless Steel Screening Equipment
Our in-house laboratory has the expertise to perform most wet chemical analysis along with some instrumental analysis. Our testing equipment includes.
- Fisher Sub-Sieve Sizer
- Ro‑Tap Sieve Shaker
- Drying Equipment
- Atomic Absorption Spectroscopy
- Volumetric KF Titrator
- Potentiometric Titrator
- Scott Volumeter
Particle Reduction, Particle Separation, Blending, and Drying services are offered for our products, yours, or a combination—all at a reasonable cost.
Custom granulation to meet your specific requirements is also available for many of the products in this catalog, subject to an additional charge.
Products prepared according to customer or government specifications may require extended lead times due to the need for specialized raw materials.
These materials often undergo additional processing and testing to ensure compliance. We recommend allowing sufficient time in the ordering process to accommodate these requirements.
Screen Size & U.S. Standard Sieve Openings
| Mesh | Microns | Inch |
| 4 | 4760 | 0.187 |
| 6 | 3360 | 0.132 |
| 8 | 2380 | 0.0937 |
| 12 | 1680 | 0.0661 |
| 16 | 1190 | 0.0469 |
| 20 | 840 | 0.0331 |
| 30 | 590 | 0.0232 |
| 40 | 420 | 0.0165 |
| 50 | 297 | 0.0117 |
| 60 | 250 | 0.0098 |
| 70 | 210 | 0.0083 |
| 80 | 177 | 0.007 |
| 100 | 149 | 0.0059 |
| 120 | 125 | 0.0049 |
| 140 | 105 | 0.0041 |
| 170 | 88 | 0.0035 |
| 200 | 74 | 0.0029 |
| 230 | 62 | 0.0024 |
| 270 | 53 | 0.0021 |
| 325 | 44 | 0.0017 |
| 400 | 37 | 0.0014 |
Sieving results are expressed in terms of “mesh”. A minus (-)before the number indicates material passing “through” a screen. A plus (+) before the number means “retained” on a screen. For example, “50% -200 +325” means 50% by weight of the material passes through a 200 mesh screen but are retained on a +325 mesh screen or 95%-100 means 95% by weight of the material passes through a 100 mesh sieve.
Screen analysis is of particular importance when using powdered, atomized or granular aluminum for pyrotechnic manufacture. As a general rule the following expressions classify aluminum screen analysis:
COARSE
4 to 30 MESH
MEDIUM
30 to 80 MESH
FINE
80 to 120 MESH
Other definitions for coarse, medium, fine and extra fine:
COARSE
40 to 50 MESH
MEDIUM
50 to 100 MESH
FINE
100 to 200 MESH
EXTRA FINE
200 MESH AND DOWN
Please accept our appreciation and sincere thanks for letting us serve you. Sometimes, in the rush of business life we fail to say thank you loud enough. But you can be sure your patronage is never, never taken for granted. Our aim is to please and satisfy. To serve you is a real privilege and a pleasure.