IW Tremont

Cellulose Filter Paper, Qualitative Grade CFP4, pack/100

Part Number:
Lead Time:
5-10 days
Minimum Purchase:
1 unit
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paper fiber
filter paper
Price: $33.28 - $43.78

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Qualitative and quantitative cellulose filter paper is available in a wide range of grades to meet different separation applications.

Qualitative Cellulose

Qualitative cellulose filter papers perform separation by entrapping particulate within the random matrix of cellulose fibers within the depth of the media. This media is widely used in methods requiring the determination and identification of particulate in both liquids and gas. Also this natural fiber filter paper is commonly used to clarify liquid samples.

Also available in fluted grades, which are easier to use and more convenient than flat filters when used in a filter funnel. This format reduces your preparation time due to its sharply creased prefolded pattern. Widely used for general laboratory separation and clarification applications as well as for soil analysis methods.

Paper making capabilities:

  • Paper making machines in flat bed, slant bed, high speed fourdrinier and rotary forming styles.
  • Furnish capabilities of: glass blends, cotton cellulose, soft wood, cotton/wood pulp, synthetics
  • Various levels of water filtration, including R.O. for superior purity in analytical and diagnostic applications.
  • Web widths from 24" 60.9cm to 72" 182.8cm.
  • Basis weights from 8lb to 138lb @ 3000ft2 13g/m2 to 225g/m2.
  • Binder free, Binder burn off, Acrylic, PVA and hybrid chemistries.
  • Gantry mounted traversing densitometry as well as most other high-resolution verification sensors.
  • Static pressure, mixed and multi-stage head boxes.
  • Binderless, mixed box, spray on and pulper-saturation style binder introduction.
  • Single and multi-stage vacuum boxes.
  • Several screen variants for very high consistency formation.
  • Wet stream or dry deckle trim.
  • Unique end of machine board cut-off capability for very high density, high basis weight celluloses.
  • FDA grade manufacturing capabilities.
  • Lot selection, furnish verification and supply chain assurance.
  • Cotton batch traceability "to farm" with unique commodity procurement services.

Converting capabilities:

After the papermaking process is complete, our experienced converting staff brings your project from large master rolls down to narrow reels or sheets with ease. Sheeting, die cutting and other unique converting operations are performed at our Hawthorne, NJ facility under our strict ISO production environments.

  • High speed rotary knife sheeting +/- 0.03125".
  • Low speed, multi roll CNC sheeting +/- 0.03125".
  • Low tensile strength sheeting capabilities handling the most challenging binderless glass grades to 60" web width.
  • Vacuum stack counting with laser verification and tab insertion minimum 5 sheet count.
  • Narrow roll slitting down to 1/4inch web width even in low tensile glass microfiber.
  • Shaftless rewind with core ID's down to 1/2inch ID.
  • Die cutting in manual, semi-automatic and automatic repeating modes. Slow speed, platen, clicker, c-frame, fixed tool and bottom-up presses.
  • Tonnage from 1 to 140ton in hydraulic and mechanical types.
  • Narrow web <5.125" 13cm rotary die cutting with unique "zero-tensile" capabilities, inline micro perforation and rotary parts cut-off. Vacuum in-field parts removal.
  • Programmable guillotine cutters from 30 to 44" 76.2cm - 111.76cm width.
  • Spreading table station for woven fabrics fabrication.
  • Hole drilling, slotting and complex notching.
  • Heat treating processes ranging from low temp, long exposure to flash and 1100°C muffle furnace treatments.
  • Laminating via heat set, single and dual surface in web widths of 60".

CFP4 Features

  • The fastest flow rate demonstrated by any of the qualitative cellulose filter media's resulting in a low retention rate of approximately 25 µm
  • Very commonly used as the first media in a multi-stage filtration process
  • Ideally suited for use in organic extractions and biological fluid separation processes
  • Often specified in air monitoring applications where the entrapment of fine particulate is not required

Qualitative Cellulose Grades

Filter Media Retention Flow Ash Content % Basis Weight g/m2 Thickness mm
CFP1 11 µm Medium 0.05 86 0.2
CFP2 8 µm Medium-Slow 0.05 101 0.17
CFP3 6 µm Slow 0.05 190 0.32
CFP4 25 µm Fast 0.05 94 0.21
CFP5 2.5 µm Slow 0.05 97 0.195
CFP6 3-4 µm Slow 0.22 103 0.177



  • Filter Media: Nomenclature is serialized and no indication of grade or quality
  • Furnish: The raw materials used in the manufacture of the wet laid product
  • Ash content: Dry method, determined in exposure at 900 ºC in muffle furnace
  • Retention: Nominal retention of particulate at 98% efficiency in liquid
  • Flow: Liquid flow rate speed relative to other comparable products listed in this product alignment
  • Basis weight: Nominal weight of material per meter2 indicated "gram weight unit of measure at 8% moisture
  • Thickness: As measured under 4 psi using TAPPI method T411
  • Flat/Fluted: Flat stock is supplied as sheets, rolls or die cut parts. Fluted is -1/4 or -1/2 quadrant funnel folding
  • Surface: Stated as relative to comparable products listed in this product alignment
  • Brightness: Stated as relative to comparable products listed in this product alignment
Part # Size GE/Whatman Equivalent Ahlstrom Equivalent MFS/Advantec Equivalent
IWT-CFP4-042 4.25cm diameter 1004-042 6310-0425 N014.25CM
IWT-CFP4-055 5.5cm diameter 1004-055 6310-0550 N015.5CM
IWT-CFP4-070 7.0cm diameter 1004-070 6310-0700 N017.0CM
IWT-CFP4-090 9.0cm diameter 1004-090 6310-0900 N019.0CM
IWT-CFP4-110 11.0cm diameter 1004-110 6310-1100 N0111.0CM
IWT-CFP4-125 12.5cm diameter 1004-125 6310-1250 N0112.5CM
IWT-CFP4-150 15.0cm diameter 1004-150 6310-1500 N0115.0CM
IWT-CFP4-185 18.5cm diameter 1004-185 n/a N0118.5CM
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