Semi-refined paraffin suits most candle making, because it holds a lower oil content and a more predictable melting point than slack wax. Slack wax is a crude dewaxing output, best used for blending, packaging wax or textile-yarn paraffin, not poured directly as a candle. Buyers should confirm oil content (ASTM D721), melting point (ASTM D87) and congealing point (ASTM D938) before ordering either material.
Yarı rafine parafin mi slack wax mı hangisi mum üretimi için? For most candle makers, semi-refined paraffin is the safer default. It gives predictable melting behaviour and a cleaner burn. Slack wax has its place too — mainly in blending, packaging wax and industrial uses, not as a standalone candle wax.
Who this guide is for
This page is written for three buyers. Candle producers choosing a base wax for container or moulded candles. Wax distributors and blenders sourcing slack wax for downstream processing. Procurement teams comparing cost against performance before placing a bulk order. Each finds a direct answer to their question below.
What is the fundamental difference?
Semi-refined paraffin and slack wax both start from petroleum dewaxing, but they are not interchangeable. Slack wax is "crude petroleum wax obtained by dewaxing a distillate" and it contains a high proportion of liquid hydrocarbons, according to the IARC Monographs (NCBI Bookshelf, undated). Semi-refined paraffin has been processed further to reduce that oil content.
Oil content is the property that separates the two. It is measured against ASTM D721, the standard test method for oil content of petroleum waxes. A wax's oil content has significant effects on several of its properties, according to ASTM International (2025). Lower oil content generally means a firmer wax with a cleaner set.
Composition, in plain terms
Petroleum waxes are complex mixtures of hydrocarbons, including n-paraffins, branched-chain paraffins and cycloparaffins in the range C18–C70, according to IntechOpen (2020). Slack wax sits at the crude end of that spectrum. Semi-refined paraffin has been narrowed toward the cleaner fractions.
Melting point and congealing point: why buyers check them
Two test methods matter here. ASTM D87 covers determination of the melting point of petroleum wax by cooling curve. It is unsuitable for petrolatum-group waxes, microcrystalline waxes, or blends of such waxes with paraffin wax or scale wax, per ASTM International. Congealing point, tested to ASTM D938, measures the temperature at which a cooling wax develops a "set" or resistance to flow. This is a property many buyers care about directly, according to ASTM International (2017).
A related ISO method, ISO 3841:1977, specifies a cooling-curve melting point approach. It is unsuitable for microcrystalline waxes or blends with paraffin or scale wax. It works best on highly paraffinic or crystalline substances, per ISO. For petrolatums and other high-viscosity waxes, ISO notes that results can differ depending on the method used (ISO, undated).
| Standard | What it measures | Why a buyer checks it |
|---|---|---|
| ASTM D721 | Oil content of petroleum waxes | Oil content drives firmness, burn behaviour and blend suitability |
| ASTM D87 | Melting point (cooling curve) | Confirms the wax matches the moulding or pouring process |
| ASTM D938 | Congealing point, including petrolatum | Predicts set behaviour during cooling |
| ISO 3841 | Melting point (cooling curve) | Comparable check for paraffinic and crystalline material |
Oil content and melting point for soap production
We hold no BHD-specific spec sheet in this guide to quote a number against. What buyers should ask their supplier for, before ordering, is the oil content result under ASTM D721 and the melting range under ASTM D87 for the specific batch. Soap producers typically want the wax firm enough to hold shape, which points toward lower oil content rather than crude slack wax.
Can slack wax be used in candle making?
Slack wax is not a finished candle wax. Its high liquid-hydrocarbon content, noted in the IARC data above, makes it soft and unpredictable when poured directly. In practice, it is more useful as a blending input, in packaging wax, or in textile-yarn paraffin applications, where its properties are engineered further downstream. A candle maker pouring raw slack wax risks poor set, sweating, and inconsistent burn.
Where slack wax does belong
Slack-wax blending is a normal part of the supply chain. Producers use it as feedstock, not as a shelf-ready candle product. If a buyer is asking about slack wax specifically for candles, the honest answer is: not on its own.
Candle applications: pillar candles and beyond
The waxes family is used to make pillar candles, serving the candles industry. This covers economy and utility candles, grave, church and mourning candles, and container candles. For these formats, semi-refined paraffin grades such as HP3, M3 and UL2 are the ones buyers actually search for.
Scented and moulded candles
Moulded and scented candles need a wax that releases cleanly and holds fragrance oil without sweating. Buyers in this segment tend to prefer semi-refined paraffin over slack wax, for the reasons above: lower oil content and a more predictable melting point. This is a preference driven by process fit, not a numeric claim we can quote here without a batch spec.
Cosmetics and personal care
The waxes family is also used to make cosmetic creams and balms, serving the cosmetics-personal-care industry. Petroleum Jelly, including tiers buyers search as White, Snow White and Super Snow White, sits in this range alongside paraffin. This is a separate use case from candle pouring, and it carries its own oil-content and colour requirements.
What is the price difference between semi-refined paraffin and slack wax?
We do not have an approved price figure to publish here, and we will not estimate one. As a general rule in the trade, slack wax is a lower-processing-cost material than semi-refined paraffin, because it skips further refining steps. Buyers should request a current quote for the specific grade and volume they need — pricing moves with crude markets and processing capacity.
What to check before you order
- Ask for the oil content result under ASTM D721 for the specific batch.
- Ask for the melting point range under ASTM D87, and confirm the method suits your wax type.
- Ask for congealing point data under ASTM D938 if set behaviour matters to your process.
- Confirm whether you need semi-refined paraffin (candles) or slack wax (blending, packaging wax, textile-yarn paraffin).
- Specify the grade you need: HP3, M3 or UL2 for paraffin; the Petroleum Jelly tier for cosmetics.
- Request a current price quote rather than relying on a published figure — markets move.
- Ask how the batch was tested, and to which standard, before it ships.
- Confirm volume and delivery date in writing before committing.
Yarı Rafine Parafin Mi Slack Wax Mı Hangisi Mum Üretimi İçin: quick facts
- Semi-refined paraffin has lower oil content than slack wax.
- Slack wax is a crude dewaxing output, not a finished candle wax.
- Oil content is measured under ASTM D721.
- Melting point is measured under ASTM D87 or ISO 3841.
- Congealing point is measured under ASTM D938.
- Semi-refined paraffin grades buyers search include HP3, M3 and UL2.
- Slack wax's main role is blending, packaging wax and textile-yarn paraffin.
Semi-refined paraffin vs slack wax: comparison
| Semi-refined paraffin | Slack wax | |
|---|---|---|
| Typical use | Container, moulded and scented candles | Blending, packaging wax, textile-yarn paraffin |
| Oil content | Lower (further processed) | Higher (crude dewaxing output) |
| Set behaviour | More predictable | Softer, less predictable |
| Ready to pour direct? | Yes, for standard candle grades | Not recommended on its own |
| Common grades searched | HP3, M3, UL2 | Sold by oil-content spec, not a named tier |
Working with BHD Group
BHD Group is one accountable house behind two divisions: BHD Chemical and BHD Sourcing. Paraffin Wax, Petroleum Jelly and Slack Wax are part of the Waxes family we work in every day, alongside Bitumen and PE Wax. This guide to yarı rafine parafin mi slack wax mı hangisi mum üretimi için is meant as a practical starting point, not a full pricing sheet or comparison review. If you want a quote against a specific grade, oil-content spec or delivery date, contact us with your requirement and we will respond with what we can supply, on spec and on time.
Sources
- ASTM International (2025) — ASTM D721-25 Standard Test Method for Oil Content of Petroleum Waxes, astm.org
- ASTM International (undated) — ASTM D87 Standard Test Method for Melting Point of Petroleum Wax (Cooling Curve), astm.org
- ASTM International (2017) — ASTM D938-12(2017) Standard Test Method for Congealing Point of Petroleum Waxes, Including Petrolatum, store.astm.org
- ISO (1977) — ISO 3841:1977 Petroleum waxes — Determination of melting point (cooling curve), iso.org
- ISO (undated) — ISO standard on melting characteristics of petrolatums and high viscosity petroleum waxes, iso.org
- IARC / NCBI Bookshelf (undated) — Occupational Exposures in Petroleum Refining, ncbi.nlm.nih.gov
- IntechOpen (2020) — Introductory Chapter: Petroleum Paraffins, intechopen.com
Frequently asked questions
What is the fundamental difference between semi-refined paraffin and slack wax?
Slack wax is a crude petroleum wax from dewaxing a distillate, with a high proportion of liquid hydrocarbons (IARC, NCBI Bookshelf). Semi-refined paraffin has been processed further to reduce that oil content, which is measured under ASTM D721. Lower oil content generally gives a firmer, more predictable wax.
What oil content and melting point range are suitable for soap production?
We hold no approved spec figure to quote here. Ask your supplier for the batch's oil content result under ASTM D721 and melting range under ASTM D87. Soap producers generally want a firmer wax, which points toward lower oil content rather than raw slack wax.
Can slack wax be used in candle making, and what risks does it pose?
Slack wax is not a finished candle wax on its own. Its high liquid-hydrocarbon content makes it soft and unpredictable when poured directly, risking poor set and sweating. It is better used as a blending input, in packaging wax, or in textile-yarn paraffin.
What is the price difference between semi-refined paraffin and slack wax?
We do not have an approved price figure to publish. Slack wax generally costs less to process than semi-refined paraffin, since it skips further refining steps. Request a current quote for your specific grade and volume, since pricing moves with crude markets.
Which type of paraffin is preferred in scented and moulded candle production?
Semi-refined paraffin grades such as HP3, M3 and UL2 are preferred for scented and moulded candles. They release cleanly and hold fragrance oil without sweating, thanks to lower oil content and a more predictable melting point than slack wax.
Why buyers work with BHD Group
Two divisions operate under a single accountable house. There is no handoff between a trading desk and a sourcing desk that leaves a buyer chasing an answer — one team owns the order from enquiry to delivery.
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