I am trying to make a homemade powder laundry detergent that has a very heavy scent throw after washing. I’m air drying to preserve the scent. Everything I tried is not locking the scent onto the clothes. How would this benefit in a diy powder recipe or willing to change to liquid if it actually work. Thanks!
I’ve used everything from the standard diy grated soap recipe to using one with Sls powder.
My most current recipe used:
Beta Cyclodextrin (Cyclodextrin) is the selected product in your list that can potentially help with fragrance protection/slow release. But in your current process, it is probably not being used in a way that gives strong fabric deposition after washing.
Your main problem is not just fragrance strength. A main-wash laundry detergent is designed to dissolve, remove oily materials, and rinse them away. Most of your formula is water-soluble salts/builders, so they help water chemistry/cleaning but do not strongly anchor fragrance onto clothes.
Your listed batch is:
Total = 120 g.
So 15 g fragrance oil = 12.5% of the formula, not 6%.
If you want a true 6% fragrance formula:
Before increasing fragrance, please confirm the fragrance oil is suitable for laundry/fabric contact and within the relevant IFRA/use-limit guidance for that application.
This is the most relevant selected ingredient for fragrance. Cyclodextrin has a hydrophobic cavity that can host some small oily/volatile fragrance molecules and help protect or slowly release them.
However, dry-blending fragrance oil + cyclodextrin + Natrasorb + salts is not the same as true encapsulation. Some fragrance may simply sit on the powder carrier. Also, not every fragrance molecule fits cyclodextrin equally; performance depends on molecule size, polarity, volatility, and the fragrance composition.
This is useful for pH/buffering and water chemistry support. In laundry logic it can help as a builder/chelating-support ingredient, but it is not the main fragrance-locking ingredient.
This supports alkalinity, detergency, and water-softening/builder function. It helps cleaning more than fragrance retention. Also confirm whether your “washing soda” is anhydrous sodium carbonate or sodium carbonate decahydrate, because decahydrate contains water of crystallization and gives less active sodium carbonate per gram.
This is a mild alkaline/buffering powder. It can support pH adjustment/water chemistry, but it is not a fragrance deposition technology.
This is not expected to improve fragrance retention. In one trial, I would reduce or remove it and compare cleaning and scent retention, because magnesium salts may add ionic load and are not a primary scent-fixation tool.
Natrasorb can help turn fragrance oil into a free-flowing powder, but oil absorption is different from wash-durable fragrance deposition. It may make the jar smell strong without guaranteeing that the scent survives wash/rinse and remains on dry fabric.
Use this as a bench-trial starting point, not a guaranteed final process:
Correct the fragrance level first.
Run small 100 g trials at controlled fragrance levels, for example 3%, 6%, and your current 12.5%, rather than assuming more fragrance will solve the issue.
Pre-complex or pre-adsorb the fragrance before adding the salts.
Do not just dry-blend everything together. Make a small slurry of Beta Cyclodextrin (Cyclodextrin) with a small amount of water or water/ethanol, then slowly add the fragrance while mixing well. The goal is to wet, disperse, deagglomerate, and allow complex/adsorbed carrier formation—not to “dissolve” the fragrance oil.
Try lower fragrance loading on cyclodextrin.
Your current ratio is 6 g cyclodextrin : 15 g fragrance, which is likely too fragrance-heavy for efficient complexation of all fragrance components. As a screening trial, compare ratios around 1 part cyclodextrin : 0.2–0.5 part fragrance by weight.
Dry gently before adding the soluble salts.
After the cyclodextrin/fragrance carrier is prepared, dry it gently, then blend it with the rest of the powder.
Age the carrier before final evaluation.
As a trial method, hold the pre-complexed fragrance carrier in a closed container for 24–48 hours, then compare scent in the powder, wet laundry, and fully dry fabric.
Run a side-by-side Epsom salt test.
Make one batch with Epsom salt and one without it. If scent or cleaning improves without it, leave it out.
Switching to liquid will not automatically fix scent retention. If you make a liquid, you would need a proper fragrance solubilizing/emulsifying system and preservation system; simply adding this powder blend and fragrance to water is not recommended.
For the strongest scent on dry laundry, the more effective route is usually to move the fragrance delivery to a final-rinse, dryer, or leave-on fabric treatment format. The main wash is the hardest place to make fragrance last because the system is designed to remove oils and then rinse them away.
In short: Beta Cyclodextrin can help, but only if you pre-complex/pre-disperse the fragrance properly and test it at realistic ratios. The salts in the detergent are mainly for cleaning/water chemistry, not scent anchoring. For a very heavy scent throw after drying, a final-rinse or leave-on/dryer route will usually outperform a main-wash powder.
Sources supporting the key technical claims in this answer
Supports the general use of cyclodextrins for encapsulating volatile/fragrance molecules.
Marques, H.M.C., “A review on cyclodextrin encapsulation of essential oils and volatiles,” Flavour and Fragrance Journal, 2010.
Supports the need for complex formation and the dependence of performance on guest molecule properties.
Ciobanu et al., “Essential oil–cyclodextrin complexes: an updated review,” Journal of Inclusion Phenomena and Macrocyclic Chemistry, 2017.
Supports cyclodextrin-assisted fragrance anchoring concepts in textile applications.
Khanna et al., “Performance assessment of fragrance finished cotton with cyclodextrin assisted anchoring hosts,” Fashion and Textiles, 2015.
Supports the distinction between simple absorption and more durable encapsulation approaches for flavours/fragrances.
Perinelli et al., “Encapsulation of flavours and fragrances into polymeric micro- and nanocapsules,” Molecules, 2020.
This is wonderful information!
I use a top load HE washer with a single rinse. I may have gotten the fragrance load off from what I actually used. I’ve tried several formulations of detergent.
Some other ingredients were:
I do let the scent marry with the cyclodextrin for about a day before adding it to the fixatives that I have tried. I then let it marry for about a week after that.
I have tried some rinses which have helped. I have tried adding several drops of oil to vinegar in the rinse section which helped a little bit, not much.
What is bringing me down this road is trying to have a strong fragrance throw laundry soap/detergent like the ones I had bought from a specialty store. The ones from there left a strong scent with just the detergent.
I’d be happy to use products that you’d recommend from this site. My next route is looking like a fabric rinse to try and accomplish the fragrance, but any help down the washing road is greatly appreciated!
I greatly appreciate the technical papers as well. I like to understand the chemistry of this all. There’s not a lot of documentation out there for more advanced DIY laundry detergent beyond the basic soap/washing soda/borax/baking soda recipe.
Thank you for the extra detail — this makes the issue much clearer. Your problem is probably not that the dry detergent cannot hold fragrance. It is that the fragrance is not efficiently depositing onto the fabric and surviving the rinse/dry process.
A wash detergent is the hardest place to create strong, long-lasting scent because the wash chemistry is designed to remove hydrophobic/oily materials from fabric. Surfactant, alkalinity, builders, agitation, dilution, and the rinse step all push fragrance to solubilize, emulsify, or drain away instead of staying on the textile.
Use the detergent mainly for cleaning, then test a separate rinse-stage fragrance system for scent deposition. This is more realistic than trying to make one powder clean strongly and also leave a heavy perfume throw.
For the detergent route:
Cyclodextrin, Natrasorb, kaolin, dendritic salt, and similar materials can make a powder smell strong and easier to handle, but that is different from making perfume deposit on fabric. The fragrance is not truly dissolving in salt, clay, Natrasorb, or most solid carriers; it is being absorbed, adsorbed, complexed, or dispersed. It still needs a mechanism to transfer to the textile and remain after rinsing.
Benzyl benzoate may help dissolve or slow evaporation of some perfume materials, but it is not by itself a complete laundry fabric-deposition system.
Adding oil to the rinse compartment can help a little because it is later in the cycle, but neat oil in vinegar/water can separate, float, spot fabrics, or rinse away unevenly. For a rinse experiment, first make a small uniform fragrance premix using a suitable solubilizer/emulsifier system, then dilute it into the rinse water and check for oil droplets, separation, staining, yellowing, and fabric feel.
Do not combine an anionic detergent concentrate with a cationic rinse/deposition system in the same bottle or dry blend. If you test cationic-style deposition chemistry, keep it as a separate rinse-stage product.
Run controlled side-by-side tests using the same washer, load size, water level, cycle, detergent dose, fragrance percentage by weight, fabric type, and drying method:
Evaluate scent on wet fabric, dry fabric after 2 hours, after 24 hours, and after storage. Also check oily spots, residue, dulling, yellowing, and irritation potential.
Commercial specialty scented detergents often use perfume systems designed for deposition, such as substantive perfume ingredients, encapsulated fragrance, cationic rinse systems, or polymeric deposition aids. A simple powder made from salts, soap/surfactant, and fragrance carriers may smell great in the jar but may not match that dry-fabric performance without a real deposition mechanism.
