Many people buy the kiln first and only realize after the first few firings that the real difference lies in the accessories. Not because they're "nice to have," but because they determine whether you fire safely, efficiently, and without costly damage.
If you're looking for the basics of temperatures, bisque firing/glaze firing, and firing curves: Firing ceramics: Basics, temperatures, and techniques explained . And if you're just deciding which kiln is right for you: Buying a kiln: What size, power, and technology do you need?
Quick start: The minimum setup for your first safe fire
If you want to start in a very pragmatic way, all you need to begin with is:
- Oven plates (to fit your oven)
- Supports / columns (to build levels)
- Release agent (Kiln Wash) for plates/oven floor
- A plan for setting up the furniture (distances, height, air space)
Important: Never place glazed pieces directly on the oven floor. Placement plates protect the oven from glaze drips. 
Accessories overview: What each item is for
| Accesories | What you need it for | Typical beginner mistake |
|---|---|---|
| Oven plates | They support the fuel, protect the oven floor, and allow for different levels. | Incorrect size / too little distance to the wall → jams, tears, splinters. |
| Supports / Columns | Stack stably, create height, distribute load. | Too many supports / uneven support → slab warps or breaks. |
| Release agent (Kiln Wash) | Protective layer: The glaze does not run into the slabs and can be lifted off. | Applied too thickly or on both sides → flaking/flaking. |
| Burning aids (stands, tripods) | Lift off glazed pieces, minimize contact points. | Incorrect placement → imprints, wobbling, glaze defects. |
| Fuel rods / heating elements | Wear part: generates the heat. Will need to be replaced eventually. | Changing too late → long burning times, uneven results. |
Oven plates: Material, thickness, shape and the most common defects
Oven plates are the "floor" of your oven. In Germany, Austria, and Switzerland (DACH region), cordierite/fireclay plates are very common. Robust, but not indestructible. More important than the brand are: correct dimensions, the right thickness, and even weight distribution.
Two things that many only learn the hard way:
- Plates have temperature limits. If you continuously burn food above the maximum temperature, you risk warping and material damage.
- Plates prefer evenly distributed loads. Items that are too heavy on a plate that is too thin, or point loads, will lead to cracks or warped surfaces.
One specific, frequently mentioned point: slabs should not be supported haphazardly. Instructions often recommend stacking slabs neatly and stably on supports, avoiding excessive contact points.
Supports & Setups: Stack stably without stressing the panels
Supports (columns/posts) are not "accessories," but rather an integral part of your shelving system. Good setups save energy because you utilize the oven more efficiently, and they reduce the risk of tipping and shelf breakage.
A common professional approach: standardized heights . If you set up a set of supports at typical heights, you can quickly build levels without having to improvise each time.
Why cordierite is often mentioned: dimensionally stable, heat-resistant, reliable and suitable for many standard fires up to high temperatures.
Release agent: How to protect plates and oven floor
Kiln wash is a protective layer that prevents glaze runs from soaking into or sticking to porous slabs. This allows you to easily lift off glaze residue later instead of "sacrificing" the slab.
This is often described very similarly: the glaze should not penetrate or stick, but should be removable along with the entire layer. See, for example, Brock Pottery Supplies: Release Agent .
Depending on the product/manufacturer, there are specific mixing and application instructions (e.g., "apply thinly").
Burning aids: Stands, tripods & co. (when useful, when risky)
Firing aids are tools used to "decouple" glazed pieces, for example, with highly runny glazes or special shapes. The trade-off: You reduce the contact area, but risk marks or instability if you position them incorrectly.
A good, less obvious tip: test pieces. When testing new glazes, test the combination of glaze and firing aid in the same firing. This will save you from unpleasant surprises (e.g., the glaze runs more than expected). 
Fuel rods / heating elements: Understanding wear and tear & replacing them correctly
Fuel rods/heating elements are consumable parts. Eventually, they weaken. Not always "all at once," but gradually: burning times become longer, peak temperatures are harder to reach, and in the worst case, the heat in the furnace becomes less even.
If you've already had orders for fuel rods, that's a good sign: This is exactly the kind of accessory that real stove owners need regularly. It's worth stating this openly in buyer's guides (and also in product advice): A stove is a system, and maintenance is part of that.
For brand/model-specific details (e.g., Kittec), you can find more detailed internal links: Guide: Kittec Kilns . 
Care & Safety: Dust, Cleaning, Storage
A topic many underestimate: dust . Especially old oven/firebrick dust and ceramic dust should not be stirred up. In practice, the advice is often: clean with a damp cloth, ventilate well, and wear a mask/respirator when working in dusty conditions.
For "Shelf Maintenance" and dust, it is often recommended to clean carefully and wear protection (masks/respirators) instead of stirring up dust.
Checklist: Before buying & before the fire
- Is the panel size suitable? (Diameter/inner dimensions, plan for distance to the wall)
- Do you have enough support heights? (Standard heights instead of improvisation)
- Is a release agent present? (Protect the baking tray/oven floor. Apply a thin layer and let it dry.)
- Loading plan? (not too tightly packed, leave air passages, nothing on the oven floor with glaze)
- Maintenance plan? (Fuel rods/heating elements are wear parts)
-
Dust handling? (clean with a damp cloth, wear protective gear, ventilate well)
FAQ
Do I need to apply release agent to both sides of the oven plate?
In practice, usually only the "top" side is treated. This reduces chipping and prevents flakes from falling into underlying glazes. (This topic is very often described this way in community discussions.)
How much distance should an oven plate need from the oven wall?
Leave some space on the sides so that the plate and oven can move slightly when heated without jamming. Many experienced users deliberately measure with a little extra room.
Why is my firing uneven even though the temperature is correct?
Common reasons include overcrowding, uneven load distribution, insufficient airflow, or an oven that takes longer to heat up due to worn heating elements.