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Paper Mill Process Water Dipslides (Box of 10)

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  • Paper Mill Dipslides. Test bacteria, yeast and moulds.
  • Paper Mill Dipslides Results
Includes TTC
Red Spot Dye
Paper Mill Dipslides. Test bacteria, yeast and moulds.

Paper / pulp testing dipslides - Process water testing.

Pack Size
10 dipslides

Rapid delivery
Made in the UK
Manufactured in ISO 9001 certified conditions.
Pay via Credit/Debit Card, PayPal or bank transfer online. PO number can be added during checkout if required.

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Volume Discounts
Order 25 or more boxes Receive a 2.5% discount Price per box £11.66
Order 50 or more boxes Receive a 5.27% discount Price per box £11.33
Order 100 or more boxes Receive a 8.92% discount Price per box £10.89
Order 250 or more boxes Receive a 14.24% discount Price per box £10.26
Order 500 or more boxes Receive a 18.89% discount Price per box £9.70
Order 1000 or more boxes Receive a 33.65% discount Price per box £7.94
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Product Information
Front Agar Type Nutrient TTC
Front Agar Colour Straw
Front Agar Growth Total Count
Rear Agar Type Malt Extract
Rear Agar Colour Brown
Rear Agar Growth Yeasts & Moulds
Shelf Life 6 to 8 months
Certification ISO 9001
Important information Approx 1 week until dispatch

About the paper mill process water dipslides (box of 10)

Paper / Pulp: Process Water Dipslides

Our Paper Mill Dipslides test for bacteria, yeasts and moulds (fungi). They feature a different agar (strip of culture medium) on each side of the dipslide. One side of the dipslide has Nutrient TTC agar. Nutrient TTC agar tests for / grows aerobic bacteria colonies. The bacteria on this agar will grow as red spots, making it easier to view and count colonies.

The other side of the dipslide features Malt Extract agar. This agar tests for / grows yeasts and moulds colonies. If there is bacteria, yeasts or moulds in your sample, it will grow on these agars as colonies / dots. You then need to compare the amount of dots on the dipslide to the amount of dots on the chart provided to assess the level of contamination.

To use the test, you can either dip the slide into your sample, swab onto the dipslide or press the slide against a surface. Once your sample has been transferred onto the dipslide, you then incubate the dipslide. After incubation, you can then count the colonies / spots and compare with the chart.
A step by step pictorial guide can be found further down the page.

Why do I need to test paper process waters for bacteria?

Process waters used in the production of paper can become contaminated by microbiological organisms. If the waters contain high levels of bacteria, yeasts and moulds, it can negatively affect the heath of workers within the production facilities. The inhalation of bacteria as well as skin contact can contribute to respiratory and skin conditions. Pathogenic bacteria such as legionella can also be present.

Due to process waters in paper production being recycled, it is even more likely to become contaminated with micro organisms. Add to this, the temperature of the water and the nutrients within the water (starch etc), process waters are a perfect environment for microbial growth.

A study undertaken by HSE ( found that:
"In summary, this study of nine representative paper mills has provided evidence that bacteria multiply in process waters to concentrations often in excess of 10 million culturable bacteria per ml" (equivalent to 107 on our dipslide comparison chart).

As well as worker health, contaminated water containing biofilm can affect the operation of machinery and the quality of the end product.

How to use Paper Mill Dipslides

Remove Pulp / Paper slide from tube

Step 1 : Remove slide

Carefully remove the sterile Pulp / Paper dip slide from its tube ensuring that no contact is made with the agar (to avoid contamination).

Surface testing

Step 2 : If Surface Testing

For surface testing, press the Pulp / Paper dipslide onto the surface. If needed, place a finger on the bottom of the slide (on the plastic, not the agar) to apply extra pressure.

Liquid Testing

Step 2 : If liquid testing

For liquid testing, immerse the Pulp / Paper dipslide into the fluid for 10 seconds then remove and allow to drain for a few seconds.

Swab Testing

Step 2 : If swab testing

Apply a sample of the test substance to a sterile swab and gently apply to the agars.

Incubate the dipslide

Step 3 : Incubate Slide

Label the tube with the included stickers then place the slide into an incubator and allow to incubate.

compare dipslide results

Step 4 : Compare results

Count the amount of colonies that have grown on the slide and compare them to the comparison chart provided.

Paper Mill Dipslides Features

Flexible paddle

Flexible Paddle

Each dipslide features a virtually unbreakable and flexible paddle allowing for even, full surface testing.

Easy run off design

Easy Run Off Design

Due to the design of the dipslide, fluids will drain off quickly during testing.

Recessed Handle

Recessed Handle

Each slide has a handle built into the lid that is recessed to help keep your fingers dry during testing.

Side Indicator

Side Indicator

One side of the slide will have a circle indicator so you know which side was used for testing which type of contaminant.

Dual sided paddle

Dual Sided

Each dipslide is dual sided to allow multiple contamination testing with one test.

Thick reliable Agar

Thick Reliable Agar

Each agar is thick (approx 4mm) and raised above the dipslide to allow for easy surface testing.

Reading The Results

Nutrient Side

Level of infection in liquids







Approx colonies per agar







Example Image

102.jpg 103.jpg 104.jpg 105.jpg 106.jpg 107.jpg

Level of infection on surfaces

0.4 2.5 12 40 100 250

Malt Extract Side

Level of yeasts in liquids







Approx yeasts colonies per agar







Example Image

Yeast dipslide growth Yeast dipslide growth Yeast dipslide growth Yeast dipslide growth Yeast dipslide growth Yeast dipslide growth

Level of yeasts on surfaces







Malt Extract Side

Level of moulds




Example Image

Light mould growth on slide Medium mould growth on slide heavy mould growth on slide

Customer Questions


What level of contamination is unacceptable for paper mill process waters?


Please refer to the below test from 'The microbiology of paper mill process waters: Prepared by the Health and Safety Executive':
"Action levels for evaporative cooling systems (cooling towers etc.) in HSE guidance HSG274 are based on culturable detection of Legionella species (cfu/L). HSG274 Part 1 (The control of legionella bacteria in evaporative cooling systems) refers to indicative levels of bacteria, typically referred to as total viable counts (TVCs) as measured by dip slide tests. In this guidance, the TVC concentration representing an alert level for corrective action for evaporative cooling systems is 105cfu/ml. While that alert level is not applicable to paper mill process waters because such recirculating process waters are inherently higher in bacterial loading, the principles of risk assessment and control described in the guidance are useful."

Additional Details

Product Reference : PMDS

Internal catalogue reference : DS001-80

Product external rating on

Awaiting first review


Download MSDS

MSDS Sheet for Dipslides

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Paper Mill Datasheet
Paper Mill Dipslide Datasheet (PDF)

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