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Ceramic Spot Plate
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Chemical Ceramics

Ceramic Spot Plate

6 / 12 / 24 Wells · White & Black Glaze · Micro Qualitative Reactions

The spot plate, also called a reaction or comparison plate, is a standard vessel for micro qualitative analysis. A drop or two of sample and reagent in each well is enough to observe colour change, precipitation or gas evolution. White glaze suits dark precipitates and coloured products; black glaze suits white or pale precipitates. Porcelain resists acids and alkalis, cleans easily and can be reused.

6 – 24Wells
11 – 18 mmWell dia.
4 – 6 mmWell depth
90 – 160 mmOverall size

Specifications are subject to confirmation with your enquiry.

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Hard Porcelain 6/12/24 Wells White / Black Glaze Acid & Alkali Resistant Reusable

📐 Highlights:
Glazed hard porcelain · 6 / 12 / 24 wells · white glaze for dark products, black for pale · fully reusable

  • Material — Glazed hard porcelain, smooth well walls
  • Wells — 6 well / 12 well / 24 well
  • Glaze — White or black, selected to suit the test
  • Corrosion — Resists common acids and alkalis (not HF)
  • Cleaning — Rinse with water or soak in dilute acid
  • Use — Micro qualitative tests, colour and precipitate observation
We will follow up on your inquiry as soon as possible. Custom sizes supported Samples available
Specifications

Specifications

Dimensions below are the standard production range for ceramic spot plates. Sizes are given as a selection hint only; please check the actual product.

Request custom specs

Ceramic spot plate sizes

WellsWell dia. (mm)Well depth (mm)Overall size (mm)Glaze
618690 × 55 × 10White / Black
12145110 × 75 × 10White / Black
24114130 × 90 × 10White / Black
6 (strip)186160 × 45 × 10White / Black
Values are typical; reasonable tolerances apply between production batches. Please rely on actual measurement.
📌 Customization:
• White or black glaze, or supplied as a mixed pair
• Custom well counts and outlines, including strip and round formats
• Bulk orders support specified packaging and size combinations

Product Description

1. Overview

A spot plate is a small porcelain or glass plate with a set of shallow wells. Adding one or two drops of sample and reagent to a well makes colour changes, precipitates and bubbles easy to observe, with very small sample consumption and immediate visual feedback.

This plate is formed from hard porcelain and glazed, giving smooth, non-wetting well walls that make observation and cleaning straightforward. White glaze provides strong contrast for dark precipitates and coloured complexes, while black glaze suits white or pale precipitates. Common versions have 6, 12 or 24 wells.

Spot plates are reusable, more economical than spot paper and more sample-efficient than test tubes. They are widely used for qualitative identification of elements, ion detection, teaching demonstrations and rapid pre-testing. Rinse and dry between runs to set up large batches of parallel observations.

🔬 Types & Features:
White glaze — strong contrast for dark precipitates and coloured products.
Black glaze — brings out white, pale precipitates and turbidity.
Multiple well counts — 6, 12 or 24 wells for parallel work.
Reusable — easy to clean and more economical than spot paper.

2. Key Parameters

  • Material: hard porcelain with glazed surface
  • Wells: 6 well / 12 well / 24 well
  • Glaze: white or black
  • Corrosion: resists common acids and alkalis; not for HF
  • Cleaning: rinse with water or soak in dilute acid
  • Applications: micro qualitative analysis, teaching demonstrations

3. Material & Workmanship

The plate is formed from quality ceramic material, fired at high temperature and glazed. The glaze layer is even and dense, and the smooth well walls reduce reagent hold-up and carry-over. Flat well bottoms make precipitate habit and colour changes easy to judge.

Handling tip: rinse with water after each use and soak in dilute acid for stubborn residues. Avoid knocks and retire the plate if a chip appears.

Applications

Typical Uses

Element identification

ion detection and characteristic colour reactions

Precipitate study

formation and habit of micro precipitates

Colour comparison

semi-quantitative checks against a colour scale

Gas reactions

observing small bubbles and odour changes

Industries

  • Chemistry teaching demonstrating reactions and running parallel tests
  • Quality control rapid pre-tests and semi-quantitative judgements
  • Pharmaceutical R&D fast screening of reaction conditions
  • Environmental testing rapid screening of water samples
  • Food inspection quick colour tests on extracts

Selection Guide

Select by what you observe

ObservationSuggested glazeNotes
Dark precipitates, coloured complexesWhiteWhite background gives clear contrast
White or pale precipitatesBlackDark background makes them readable
Multiple parallel tests12 / 24 wellSeveral reactions on one plate
Teaching demonstrations6 wellLarger wells, easier to view and clean

💡 Tips: Well count — more wells means smaller wells; choose by sample volume.
Glaze pairing — keeping both white and black plates makes any colour easy to read.
Tools — use a capillary or dropping pipette and add only one or two drops.
Cleaning — dilute acid soak plus a water rinse; never scrape the glaze.

Operation & Maintenance

Operation Guide

Spot plates are used for micro-scale observation. Operation is simple, but reagent volume and cleaning discipline matter. The steps below cover routine use.

03

Before Use

  • Check the plate for chips or cracks
  • Rinse with water and dry so no residue remains in the wells
  • Choose a white or black plate to suit the observation
  • Prepare pipettes, capillaries and the required reagents
  • Place the plate on a stable, well-lit surface, over white or black paper if helpful
04

Procedure

  1. Add one or two drops of sample to a well with a pipette or capillary
  2. Add an equal or specified volume of reagent without overflowing into the next well
  3. Swirl the plate gently or stir with a thin glass rod to complete the reaction
  4. Observe colour, precipitate and bubbles from above or from the side
  5. Record the observation and compare with a colour scale or blank where needed
  6. Rinse immediately so reagents do not dry in the wells
05

Cleaning & Care

  • Rinse every well with water straight after use
  • Soak stubborn residues in dilute acid or alkali, then rinse
  • Use a soft brush on the well walls; never use steel wool or hard scrapers
  • Drain upside down or wipe dry to avoid water marks
  • Store on a rack or soft mat rather than stacked loose

💡 Lab veteran tips: Small volumes — one or two drops per well keeps liquids from bridging.
Keep wells separate — do not fill to the brim, or tilting will mix them.
Background choice — white plate over black paper for pale products, black plate over white paper for dark ones.
Rinse early — dried reagents are harder to remove and may attack the glaze.

Care & Notes

Show care & notes

⚠️ Safety Notes

Volatile reagents

run reactions that release irritant or toxic gas in a fume hood

Carry-over

use separate wells or a fresh plate for different samples

Do not
  • Corrosive reagents: do not leave concentrated acids or alkalis in the wells
  • Fragile ware: avoid knocks and retire the plate at the first chip
  • Waste: collect reaction liquids for proper disposal, never down the drain

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Need Ceramic Spot Plate?

Ceramic spot plates in 6, 12 and 24 well versions with white or black glaze. Custom well counts and outlines available; samples on request.

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Ceramic Spot PlateWells 6 – 24 Get a Quote