Quick Answer: The Staining Box is a container into which a rack of microscope slides is lowered so that every slide is immersed in the same stain or solution at once. A row of slide staining boxes, each holding one reagent, lets histology and cytology slides move through a staining schedule as a batch.
Batch Staining by Immersion
Routine stains such as haematoxylin and eosin involve many steps: removing wax in xylene, graded alcohols down to water, haematoxylin, a rinse, differentiation, bluing, eosin, then alcohols and xylene again before mounting. Doing that slide by slide with a dropper is slow and uneven. With staining boxes the slides stand in a carrier rack, and the whole rack moves from box to box, so each slide spends the same time in each solution.
A box differs from a Coplin jar, which holds a few slides upright for small runs, and from a staining bar over the sink, where reagents are flooded onto slides lying flat. Immersion uses more reagent, but that reagent can serve many batches, and keeping the box covered slows evaporation of alcohol and cuts xylene vapour at the bench.
Whether a box and its rack tolerate xylene, hot solutions or strong acids depends on the material, which the listing does not state. Glass resists all of these; many plastics handle aqueous stains and alcohols well but soften in xylene. Settle this before assigning a box to the clearing steps.
Applications
- Dewaxing, staining and dehydrating paraffin sections through an H&E schedule
- Papanicolaou staining of cytology smears in batches
- Running a class set of student sections through one stain with identical timing
- Holding a reagent that is reused across many batches, such as a stock haematoxylin
Specifications
| Item | Staining box for immersing a rack of slides |
| Method | Batch immersion, one reagent per box |
| Typical schedules | H&E, Papanicolaou and other multi-step stains |
| Used with | Slide carrier rack moved from box to box |
| Material, capacity and rack type | Confirm at enquiry |
Care & Handling
- Label every slide staining box with its reagent and filling date, and keep the boxes in schedule order along the bench.
- Keep boxes of xylene and alcohol covered, and use them in a fume cupboard or a well-ventilated area.
- Filter or replace a stain once deposits form or staining weakens, rather than topping it up indefinitely.
- Drain the rack for a moment between boxes to limit carry-over from one reagent into the next.
Why Choose LabEquip
Histopathology teaching labs, cytology units and colleges running paraffin-section practicals buy staining boxes as a set, one for each step of their schedule. LabEquip lists this box in its Microscope & Optics range; state how many boxes your schedule needs on the contact page.
Frequently Asked Questions
How many staining boxes does a haematoxylin and eosin schedule need?
One for each solution: usually two or three of xylene, a descending alcohol series, water, haematoxylin, acid alcohol, a bluing solution, eosin, an ascending alcohol series and final xylene. That easily comes to well over a dozen boxes in a line.
What is the difference between a staining box and a Coplin jar?
A Coplin jar holds a few slides upright in grooves and suits small runs or a single student. A staining box takes a whole rack at once, so larger batches get identical timing in every solution.
Can xylene be used in the staining box?
Only if the box and rack are made of a material that resists it, such as glass or a solvent-resistant plastic. Some plastics soften or cloud in xylene, so check the material with LabEquip when you enquire before using it for clearing.
How do I stop reagents contaminating each other?
Lift the rack out slowly, let it drain for a few seconds and touch its lower edge on absorbent paper before lowering it into the next box. Keep the boxes in fixed order so the same box always holds the same reagent.
How often should the stain in a box be changed?
Judge by the result rather than the calendar. When nuclei stain pale, eosin looks muddy or a film forms on the surface, filter or replace the solution. Heavily used alcohols and xylene need changing sooner, because water and wax carry over from earlier steps.
Why keep the box covered?
A lid slows evaporation of alcohol, keeps dust out of the stain and reduces solvent vapour at the bench. Uncovered absolute alcohol also takes up moisture from the air, which weakens dehydration.
Last Updated: September 2026
Reviews
There are no reviews yet.