Ahlstrom Qualitative Filter Papers, Grade 613

Ahlstrom Grade 613: 6 m - Medium Speed (non wet-strengthened). This is a strong filter paper with a medium flow rate and retention. Ahlstrom 613 is commonly used in student laboratories. This strong general-purpose filter is also useful in Buchner funnels for barium carbonate, lead chromate and beryllium hydroxides.

Standard Grades (Non Wet-Strengthened). Standard qualitative filter papers are suitable for quadrant folded or gravity flow applications. These grades contain a high level of alpha-cellulose that provides high purity but will weaken when wet. The inherent strength of standard (untreated) grades does not pose a problem when they are used in routine quadrant folded applications. Ahlstrom does not recommend these grades for use in vacuum work or when wet handling is required.

• Qualitative analysis
• Low ash content 0.06%
• > 95% super refined -cellulose and linter fibers
• Untreated
• Consistent performance
• Custom cut
• Bulk packaging

Grade 613 Properties:
• Retention: 6.0 µm
• Filtration speed (punch Herzberg): 114 sec./100 mL
• Filtration speed (Rapidity): 60 mL/min.
• Loading capacity: Medium
Image(s) are representative of the product group and not necessarily the individual product.

Circles
Filter Size (cm): 4.25 cm

Circles
Filter Size (cm): 4.7 cm

Sheets
Filter Size (cm): 6 x 6 in.

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Filter Size (cm): 7.5 cm

Sheets
Filter Size (cm): 7 x 7 in.

Sheets
Filter Size (cm): 8 x 8 in.

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Filter Size (cm): 9 cm

Sheets
Filter Size (cm): 9 x 9 in.

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Filter Size (cm): 10 cm

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Filter Size (cm): 11 cm

Circles
Filter Size (cm): 12.5 cm

Circles
Filter Size (cm): 15

Circles
Filter Size (cm): 18.5 cm

Circles
Filter Size (cm): 20.5 cm

Sheets
Filter Size (cm): 20 x 20 in.

Circles
Filter Size (cm): 24 cm

Circles
Filter Size (cm): 25 cm

Circles
Filter Size (cm): 27 cm

Circles
Filter Size (cm): 32 cm

Circles
Filter Size (cm): 33 cm

Circles
Filter Size (cm): 38.5 cm

Circles
Filter Size (cm): 40 cm

Circles
Filter Size (cm): 45 cm

Sheets
Filter Size (cm): 46 x 57 cm