Coplin Jar with Blood Smear Slides
A clean, editable icon of a Coplin staining jar holding blood smear slides — ready for your histology and microscopy figures.
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What is Coplin Jar with Blood Smear Slides?
A Coplin jar is a small lab container used to hold and stain microscope slides, such as blood smears, by submerging them in reagent. This icon shows a Coplin jar with blood smear slides inside, a familiar element of histology and microscopy workflows. With SciFig you describe the object in plain language and generate a clean, editable Coplin jar icon you can relabel, recolor, and export as SVG or PNG for protocols, posters, and figures.
Why staining figures need this vessel drawn explicitly
- Manual staining protocols are defined by immersion: a step means "slides submerged in reagent X for t seconds". A drawing that shows slides standing in a filled jar encodes both the reagent and the dwell time in one glyph.
- Reagent series (fixative → stain → buffer → rinse) are far easier to follow as a row of identical jars with different fill colours than as a paragraph of prose.
- Photographs of glassware reflect the bench and the photographer; a flat vector jar with a transparent fill reads cleanly on a poster at 2 m viewing distance.
- Getting the vessel right signals method fidelity — a Coplin jar (5–10 slides, vertical, small reagent volume) is not a Wheaton staining dish or a horizontal boat, and reviewers who run these protocols notice.
Parts to include in the drawing
- The jar body with its internal grooves or ridges — these hold slides upright and apart, and drawing them is what distinguishes this container from a generic beaker.
- The screw or friction lid, drawn on for solvent steps (methanol fixation, xylene clearing) and off or ajar for aqueous steps, so the figure communicates volatility handling.
- Reagent fill level with a visible meniscus, stopping just below the frosted end of the slides — over-filling to the rim is a common drawing error and misrepresents the ~40–70 mL working volume.
- The slides themselves: standard 75 × 25 mm rectangles with a frosted label end at the top, and the smear itself as a feathered wedge — thick body tapering to a monolayer feather edge, which is where cells are actually examined.
- Stain colour cues if the protocol depends on them: methanolic eosin/methylene blue for Wright–Giemsa gives a deep violet bath; a haematoxylin bath is blue-black, eosin pink.
- Optional: a slide being lifted with forceps, which turns a static object into a step in a sequence.
Where the staining jar shows up
- Haematology method figures: peripheral smear preparation, air-dry, methanol fix, Romanowsky-type stain, rinse, differential count.
- Malaria and blood-parasite workflows, where thick and thin films go through different fixation and Giemsa steps and the figure must keep them distinct.
- Histology and cytology SOPs: deparaffinisation and rehydration ladders (xylene → graded ethanols → water) drawn as a jar series.
- Bench training material and lab-safety slides, where solvent jars, lid handling, and waste routing are the teaching point.
- Cytogenetics and FISH protocol schematics that include a slide-immersion pretreatment or denaturation step.
Coplin Jar with Blood Smear Slides— templates & examples
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