Tryptone Soya (TSA) TTC + Rose Bengal Dipslides (Box of 10) (RBS)

  • Tryptone Soya (TSA) + Rose Bengal Dipslides (Box of 10)
  • TSA Red Spot Dye
MADE IN THE UK under ISO 9001
Tryptone Soya (TSA) + Rose Bengal Dipslides (Box of 10)
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Current stock level : 68 Boxes
(More due out of production shortly)

Current Stock expiry date :
11 September 2024

Our RBS dipslide is a yeast and moulds (fungi) test on one side and a total count bacteria test on the other side. Includes high quality comparison chart with photographic examples to help you to determine your results.

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Volume Discounts
Order 25 or more boxes Receive a 2.5% discount Price £12.42
Order 50 or more boxes Receive a 5.27% discount Price £12.07
Order 100 or more boxes Receive a 8.92% discount Price £11.60
Order 250 or more boxes Receive a 14.24% discount Price £10.93
Order 500 or more boxes Receive a 18.89% discount Price £10.33
Order 1000 or more boxes Receive a 21.5% discount Price £10.00
Product Information
Front Agar Type Tryptone Soya (TSA)
Front Agar Colour Straw
Front Agar Growth Total Count (TTC / Red Spot)
Rear Agar Type Rose Bengal
Rear Agar Colour Pink
Rear Agar Growth Yeasts & Moulds
Certification ISO 9001
Suggested Incubation Times 24 - 120 Hours
Suggested Incubation Temp 30°C

About Our tryptone soya (tsa) ttc + rose bengal dipslides (box of 10) (rbs)

Our RBS Dipslide tests for bacteria, yeasts and moulds. This dipslide features two different agars / growth media (one on each side of the dipslide). This dipslide has Tryptone Soya Agar with TTC (red spot dye) and Rose Bengal Agar. 

Tryptone Soya Agar with TTC - This agar features red spot dye which makes it easy to view and count colonies. TSA detects and shows growth for a wide variety of fastidious and non fastidious organisms. It is a general purpose agar that is most often used to detect aerobic bacteria.  Anaerobic bacteria can grow on this agar if incubation is under anaerobic conditions. This agar is often used for environmental testing. TSA will give a total bacterial count (TVC).

Rose Bengal Agar - This agar is selective for yeasts and moulds (fungi). It is very often used to test cosmetics and food samples. Antibiotic content in this agar may suppress bacterial growth.

To use the dipslide, 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 provided. A step by step pictorial guide can be found below.

These RBS dipslides come in a pack size of 10 slides per box. The slide has a flexible paddle and is within a shatterproof container.

How to use RBS Dipslides

Remove RBS slide from tube

Step 1 : Remove slide

Carefully remove the sterile RBS 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 RBS 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 RBS 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.

RBS Dipslides Features

Flexible RBS dipslide paddle

Flexible Paddle

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

RBS Dipslide : Easy run off design

Easy Run Off Design

Due to the design of the RBS 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 RBS 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.

What is a RBS Dipslide?

The RBS dipslide is a dual sided slide coated in two different agars. It features a Tryptone Soya Agar with TTC to detect aerobic bacteria and a Rose Bengal Agar to detect yeasts and moulds. It is often used in the food industry to monitor microbiological contamination in CFU/cm2 or CFU/ml.

Industry sectors

  • Food
  • Cosmetics
  • Environmental

Customer Questions


Hello, I would like to know if these tubes can be considered for application in the yield of paintings? Also when you say dual-sided, I find it a bit confusing to understand and wanted to be sure if each tube possesses one side which works for bacteria AND one side which work for fungi/ yeasts? Or in a box of 10 tubes are there 5 tubes for bacteria and 5 for yeasts/ fungi?
In advance thanks for your answer.


Hello, Regarding liquid paint, due to the pigment in the paint, you may not be able to see growth on the dipslide properly as the paint may cause a colour barrier making it difficult to interpret results. The alternative is to test dry paint flakes. However, maintaining sterility with this method is difficult so we only suggest testing raw materials of paints due to the concerns above. Surfaces of dry paintings could be tested using the surface testing method. Each dipslide has an agar on both sides. These can be the same agar or two different ones depending on the dipslide (10 slides per box - all slides have an agar on both sides of the slide). So this slide would have 10 slides with TSA on one side of the dipslide and Rose Bengal on the other side.


Hello - would you re-incubate the dipslide after 48hour reading for TVC upto 5 days for the yeast/ mould count?


Yes, after 48 hours, you can take the TSA side reading then continue to incubate for up to 72 hours (120 hours in total) for the Rose Bengal side.

Additional Details

Product Reference : RBS

Internal catalogue reference : DS001-6

Product external rating on

5.0 out of 5 based on 3 customer ratings


Download MSDS

MSDS Sheet for Dipslides

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Download RBS Datasheet

RBS Datasheet
RBS Dipslide Datasheet (PDF)

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