{"id":54,"date":"2026-03-16T18:52:50","date_gmt":"2026-03-16T17:52:50","guid":{"rendered":"http:\/\/www.7virides.com\/cs\/problemy\/seizing-akcelerace\/"},"modified":"2026-03-25T11:19:47","modified_gmt":"2026-03-25T10:19:47","slug":"seizing-akcelerace","status":"publish","type":"page","link":"https:\/\/www.7virides.com\/en\/mydlo\/problemy\/seizing-akcelerace\/","title":{"rendered":"Seizing and trace acceleration: causes, prevention and batch rescue"},"content":{"rendered":"<blockquote>\n<p><strong>TL;DR:<\/strong> Acceleration trace = mass thickens within 1-3 minutes (still controllable). Seizing = immediate jamming into a stiff dough (unusable). Both situations are solved by lower temperature, light trace or hot process rescue.<\/p>\n<\/blockquote>\n<p>Seizing and trace acceleration are two related but distinct complications in CP soapmaking. Trace acceleration is the rapid thickening of the soap mass - still manageable. Seizing is the immediate thickening of the mass to an unusable consistency similar to a hard paste or crumbly mass.<\/p>\n<p>Both situations are catch-alls - either the batch can be adapted or saved by the hot process method.<\/p>\n<h2 id=\"co-je-akcelerace-trace-a-jak-ji-poznat\">What is trace acceleration and how to recognize it<\/h2>\n<p>Trace acceleration: thickening occurs within 1-3 minutes after the addition of the problematic ingredient. The mass is still usable, but the window for processing (especially swirly, layers, dragging) is drastically shortened.<\/p>\n<p><strong>Acceleration levels:<\/strong><\/p>\n<ul>\n<li><strong>Mild:<\/strong> Trace will speed up, but you have 2-5 minutes to pour into the molds. Suitable for single color soap.<\/li>\n<li><strong>Medium:<\/strong> The mass thickens quickly, within 60-90 seconds. Spoon into moulds, do not use for design.<\/li>\n<li><strong>Strong:<\/strong> The mass becomes a mass in the bowl - pouring it out is difficult. Press into the mold with your hands (with gloves).<\/li>\n<\/ul>\n<h2 id=\"co-zpusobuje-akceleraci-trace\">What causes trace acceleration<\/h2>\n<p><strong>Essential oils and fragrance oils:<\/strong><\/p>\n<ul>\n<li>Eugenol - cloves (Syzygium aromaticum), cinnamon (Cinnamomum cassia, C. zeylanicum)<\/li>\n<li>Cinnamaldehyde (cinnamaldehyde)<\/li>\n<li>Vanillin - in vanilla fragrance oils<\/li>\n<li>Aldehydes (C-11, C-12)<\/li>\n<li>Styrax<\/li>\n<li>Some floral FOs (frangipani, tuberose)<\/li>\n<\/ul>\n<p><strong>Additives:<\/strong><\/p>\n<ul>\n<li>Honey - sugars accelerate saponification<\/li>\n<li>Milk - lactose reacts with lye, increasing the temperature accelerates the trace<\/li>\n<li>Sugar (added for foaming)<\/li>\n<li>Clays - especially bentonite in higher doses<\/li>\n<li>Resin (benzoe, myrrh)<\/li>\n<\/ul>\n<p><strong>Conditions of production:<\/strong><\/p>\n<ul>\n<li>High temperature oils or lye (above 50 \u00b0C)<\/li>\n<li>Overheated production room<\/li>\n<li>Too strong trace before adding EO\/FO<\/li>\n<li>Vysok\u00fd obsah kokosov\u00e9ho oleje nebo palmj\u00e1drov\u00e9ho oleje (&gt;50 %)<\/li>\n<\/ul>\n<h2 id=\"jak-predchazet-akceleraci-trace\">How to prevent trace acceleration<\/h2>\n<h3 id=\"nizsi-vyrobni-teploty\">Lower production temperatures<\/h3>\n<p>Work at a temperature of 35-40 \u00b0C for both oils and leaching solution. If it is 30 \u00b0C outside, cool the room. Every extra 5 \u00b0C doubles the rate of chemical reaction (van&#8217;t Hoff's rule).<\/p>\n<h3 id=\"light-trace-jako-startovni-bod\">Light trace as a starting point<\/h3>\n<p>Do not continue blending with a blender on medium or strong trace before adding the EO\/FO. Add fragrances on light trace (emulsion without visible thickening) and then pour.<\/p>\n<h3 id=\"oddelene-pridavani-akcelerujicich-slozek\">Separate addition of accelerating components<\/h3>\n<p>If a recipe contains both honey and accelerant EOs, add them separately or consider omitting one.<\/p>\n<h3 id=\"test-dopredu\">Test ahead<\/h3>\n<p>Always test a new FO or EO in a small batch of 200-300 g of oils before using in a full batch. Record the behaviour.<\/p>\n<h2 id=\"co-je-seizing-a-jak-ho-rozpoznat\">What is seizing and how to recognize it<\/h2>\n<p>Seizing is an extreme form of acceleration - the mass goes from a thin emulsion to a solid, waxy or crumbly consistency within seconds. Mixing is impossible, pouring into moulds unfeasible.<\/p>\n<p><strong>Result:<\/strong> The mass looks like cottage cheese, raw dough or coarse paste. The colors are erratic, the design nonexistent.<\/p>\n<p><strong>Common causes of sepsis:<\/strong><\/p>\n<ul>\n<li>Extreme amount of accelerating EO\/FO (you add too much or too strong extract)<\/li>\n<li>Combination of multiple accelerating components at the same time<\/li>\n<li>Temperatures too high<\/li>\n<li>Rescue attempt to add FO when trace is too strong<\/li>\n<\/ul>\n<h2 id=\"zachrana-zaseknute-varky-hot-process-hp\">Rescue of a jammed batch: the Hot Process (HP)<\/h2>\n<p>If the trace has accelerated to a state where it cannot work normally, you have one reliable rescue option: cooking with the hot process method.<\/p>\n<p><strong>HP rescue procedure:<\/strong><\/p>\n<ol>\n<li>Transfer the whole mass to a slow cooker \/ crockpot or ovenproof pot.<\/li>\n<li>Set to a low temperature - 60-70 \u00b0C. 80 \u00b0C in the oven.<\/li>\n<li>Stir every 15-20 minutes - the mass will first thicken further, then melt and become the consistency of mashed potatoes (applesauce stage).<\/li>\n<li>After 45-90 minutes, perform the ZAP test: take a small piece of soap (wear gloves), gently touch with your tongue. If it burns or tingles - saponification is still in progress. Neutral = done.<\/li>\n<li>Add EO\/FO and additives (colorants) after the HP phase is complete - before pouring into the molds.<\/li>\n<li>Fill the molds - HP soap is waxy and less liquid, does not require design.<\/li>\n<\/ol>\n<p><strong>Result of HP rescue batch:<\/strong> Functional soap with a rustic look. No swirls or layers. But fully functional and safe.<\/p>\n<h2 id=\"zachrana-pri-mirne-akceleraci-bez-hp\">Moderate Acceleration Rescue (no HP)<\/h2>\n<p>If the mass thickened quickly, but is still pourable:<\/p>\n<p><strong>Chaotic pour:<\/strong> Pour the mixture into the mould as quickly as possible. The mass will not be even - it will be full of air bubbles or uneven texture. But the soap will be functional.<\/p>\n<p><strong>Spoon pack:<\/strong> Use a spoon or spatula to fill the mould. The texture will be rustic. Tap the mould on the table to remove air bubbles.<\/p>\n<p><strong>Rescue one color:<\/strong> If you were planning a multi-colored soap - forget about the design and pour one color. At least the function will be saved.<\/p>\n<h2 id=\"jak-pracovat-s-akcelerujicimi-eo-bezpecne\">How to work safely with accelerating EOs<\/h2>\n<p><strong>The smell of cinnamon:<\/strong> Cinnamon (bark or leaf) has an IFRA limit of 0.05-0.6% and is strongly accelerated. Two solutions:<\/p>\n<ol>\n<li>Use fragrance oil with cinnamon scent - FOs are formulated for controlled acceleration.<\/li>\n<li>Add cinnamon as a dry powder (not EO) for aroma and color without acceleration.<\/li>\n<\/ol>\n<p><strong>The smell of cloves:<\/strong> Similar to cinnamon - eugenol accelerates strongly. Limit to a maximum of 0.5% or combine with orange FO for a clove-orange scent with less accelerating FO.<\/p>\n<p><strong>Vanilla FO:<\/strong> Always test acceleration and allow for browning (see <a href=\"\/en\/soap-making-ingredients\/fragrance-oils-soap-making\/\">Fragrance oils<\/a>). Work on light trace and pour quickly.<\/p>\n<h2 id=\"diagnosticka-tabulka\">Diagnostic table<\/h2>\n<table>\n<thead>\n<tr>\n<th>Symptom<\/th>\n<th>Probable cause<\/th>\n<th>Solution<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>The mass thickens within 1 minute after adding FO<\/td>\n<td>Accelerating FO (eugenol, aldehyde)<\/td>\n<td>Lower temperature, light trace, spooning<\/td>\n<\/tr>\n<tr>\n<td>The mass becomes instantly rigid (seizing)<\/td>\n<td>Extreme acceleration or a combination of causes<\/td>\n<td>HP rescue<\/td>\n<\/tr>\n<tr>\n<td>The mass separates into oil and white matter<\/td>\n<td>FO is not associated with soap (separation)<\/td>\n<td>Return to HP and cook<\/td>\n<\/tr>\n<tr>\n<td>Trace occurs immediately after adding honey<\/td>\n<td>Honey accelerates (sugars)<\/td>\n<td>Add honey to light trace, work quickly<\/td>\n<\/tr>\n<tr>\n<td>The soap thickens in a series of hard grains<\/td>\n<td>Overheating + fast trace (ricing)<\/td>\n<td>HP rescue or melt in water bath<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2 id=\"caste-otazky\">Frequently asked questions<\/h2>\n<p><strong>What is the difference between acceleration and seizing?<\/strong> Acceleration = the mass thickens within 1-3 minutes but is still usable. Seizing = instant jamming, soap is unusable.<\/p>\n<p><strong>Can accelerating EO be used safely at all?<\/strong> Yes, if you keep the temperatures lower, test ahead and add on a light trace.<\/p>\n<p><strong>How long does HP rescue take?<\/strong> Approx 45-90 minutes in slow cooker or oven plus cooling. 2-3 hours total.<\/p>\n<p><strong>Will HP soap look bad?<\/strong> HP soap has a rustic look - without swirls and design. But it is fully functional and safe.<\/p>\n<p><strong>Can I add EO\/FO after HP rescue?<\/strong> Yes, add after the HP phase is complete (ZAP test neutral) and just before pouring into the molds.<\/p>\n<p><strong>What temperatures are safe for work?<\/strong> 35-40 \u00b0C is ideal. Above 50 \u00b0C, the risk of acceleration increases significantly.<\/p>\n<p><strong>What if the HP rescue fails?<\/strong> In extreme cases (complete separation of the oils from the lye) the soap can be discarded. It is rare.<\/p>\n<p><strong>See also:<\/strong><\/p>\n<ul>\n<li><a href=\"\/en\/soap\/soap-making-problems\/soap-troubleshooting-encyclopedia\/\">Troubleshooting encyclopedia<\/a> - overview of all problems<\/li>\n<li><a href=\"\/en\/soap-making-ingredients\/fragrance-oils-soap-making\/\">Fragrance oils in soap<\/a> - soap safe test, FO selection<\/li>\n<li><a href=\"\/en\/soap-making-ingredients\/essential-oils-for-soap-making\/\">Essential Oils in Soap<\/a> - overview of accelerating EOs<\/li>\n<li><a href=\"\/en\/soap\/what-is-cold-process-soap\/\">What is cold process<\/a> - basics of trace and saponification<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>TL;DR: Akcelerace trace = hmota se zhoustne b\u011bhem 1\u20133 minut (je\u0161t\u011b ovladateln\u00e9). Seizing = okam\u017eit\u00e9 zaseknut\u00ed do tuh\u00e9ho t\u011bsta (nepou\u017eiteln\u00e9). [&hellip;]<\/p>\n","protected":false},"author":0,"featured_media":0,"parent":18,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-54","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.7virides.com\/en\/wp-json\/wp\/v2\/pages\/54","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.7virides.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.7virides.com\/en\/wp-json\/wp\/v2\/types\/page"}],"replies":[{"embeddable":true,"href":"https:\/\/www.7virides.com\/en\/wp-json\/wp\/v2\/comments?post=54"}],"version-history":[{"count":2,"href":"https:\/\/www.7virides.com\/en\/wp-json\/wp\/v2\/pages\/54\/revisions"}],"predecessor-version":[{"id":195,"href":"https:\/\/www.7virides.com\/en\/wp-json\/wp\/v2\/pages\/54\/revisions\/195"}],"up":[{"embeddable":true,"href":"https:\/\/www.7virides.com\/en\/wp-json\/wp\/v2\/pages\/18"}],"wp:attachment":[{"href":"https:\/\/www.7virides.com\/en\/wp-json\/wp\/v2\/media?parent=54"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}