Yeast cells on Black Cyclopore
with DAPI stain
Black Cyclopore membranes are ideal for epifluorescence and other microscopy applications requiring a contrasting background. The polycarbonate membrane is used to filter the sample and is then used directly for analysis. The dark membrane gives lower background fluorescence and improves the sensitivity of the test.
| Typical Data - Black Cyclopore Membranes |
| |
Black Polycarbonate |
| Thickness |
7 to 20 µm |
| Burst strength |
> 10 psi |
| Weight |
0.7 to 2.0 mg/cm2 |
| Maximum service temperature |
140°C |
| Porosity (void vol.) |
4 to 20% |
| Ash weight |
20.6 µg/cm2 |
| Pore density |
1 x 105 to 6 x 108 pores/cm2 |
| Opacity |
N/A |
| Autoclavable |
30 minutes at 121°C |
| Flammability |
Slow burn |
| Fiber releasing |
No |
| Leachables |
Negligible |
| Biological compatibility |
Inert |
| Typical Properties - Black Cyclopore Membranes |
Pore size
(µm) |
Nominal thickness
(µm) |
Mean porosity
(%) |
Bubble point
in water (bar)* |
Burst strength
(bar)* |
| Polycarbonate Microporous |
| 0.2 |
20 |
13 |
4 |
>1 |
| 0.4 |
20 |
15 |
2.2 |
>1 |
| * 1 bar = 14.7 psi |