<\/p>
Coloured pastes are loaded into the tube separately but are not stored in compartments. The pastes are designed to have just the right viscosity or thickness so that they don\u2019t mix, acting like solids inside the tube but flowing smoothly when you squeeze or pump it.<\/p>\n
They have similar flow characteristics to ketchup, which only gets moving with a good shake or a squeeze.\u00a0In some toothpastes, a\u00a0nozzle at the top of the tube has separate holes for different colours, ensuring they emerge as neat stripes.<\/p>\n
Read more:<\/strong><\/p>\n Asked by: Tina Chapman, Colchester<\/strong><\/p>\n To submit your questions email us at questions@sciencefocus.com (don\u2019t forget to include your name and location)<\/em><\/p>\n By Dr Emma Davies Published: Sunday, 10 April 2022 at 12:00 am Coloured pastes are loaded into the tube separately but are not stored in compartments. The pastes are designed to have just the right viscosity or thickness so that they don\u2019t mix, acting like solids inside the tube but flowing smoothly when you squeeze […]<\/p>\n","protected":false},"author":24,"featured_media":11929,"template":"","categories":[30],"acf":{"readingTimeMinutes":"< 1"},"uagb_featured_image_src":{"full":["https:\/\/c01.purpledshub.com\/uploads\/sites\/42\/2022\/04\/why-does-striped-toothpaste-always-come-out-striped.jpg",1200,536,false],"thumbnail":["https:\/\/c01.purpledshub.com\/uploads\/sites\/42\/2022\/04\/why-does-striped-toothpaste-always-come-out-striped-150x150.jpg",150,150,true],"medium":["https:\/\/c01.purpledshub.com\/uploads\/sites\/42\/2022\/04\/why-does-striped-toothpaste-always-come-out-striped-300x134.jpg",300,134,true],"medium_large":["https:\/\/c01.purpledshub.com\/uploads\/sites\/42\/2022\/04\/why-does-striped-toothpaste-always-come-out-striped-768x343.jpg",768,343,true],"large":["https:\/\/c01.purpledshub.com\/uploads\/sites\/42\/2022\/04\/why-does-striped-toothpaste-always-come-out-striped-1024x457.jpg",800,357,true],"1536x1536":["https:\/\/c01.purpledshub.com\/uploads\/sites\/42\/2022\/04\/why-does-striped-toothpaste-always-come-out-striped.jpg",1200,536,false],"2048x2048":["https:\/\/c01.purpledshub.com\/uploads\/sites\/42\/2022\/04\/why-does-striped-toothpaste-always-come-out-striped.jpg",1200,536,false]},"uagb_author_info":{"display_name":"importmanagerhub@sprylab.com","author_link":"https:\/\/c01.purpledshub.com\/bbcsciencefocus\/author\/importmanagerhubsprylab-com\/"},"uagb_comment_info":0,"uagb_excerpt":"By Dr Emma Davies Published: Sunday, 10 April 2022 at 12:00 am Coloured pastes are loaded into the tube separately but are not stored in compartments. The pastes are designed to have just the right viscosity or thickness so that they don\u2019t mix, acting like solids inside the tube but flowing smoothly when you squeeze…","_links":{"self":[{"href":"https:\/\/c01.purpledshub.com\/bbcsciencefocus\/wp-json\/wp\/v2\/rss_feed\/11928"}],"collection":[{"href":"https:\/\/c01.purpledshub.com\/bbcsciencefocus\/wp-json\/wp\/v2\/rss_feed"}],"about":[{"href":"https:\/\/c01.purpledshub.com\/bbcsciencefocus\/wp-json\/wp\/v2\/types\/rss_feed"}],"author":[{"embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcsciencefocus\/wp-json\/wp\/v2\/users\/24"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcsciencefocus\/wp-json\/wp\/v2\/media\/11929"}],"wp:attachment":[{"href":"https:\/\/c01.purpledshub.com\/bbcsciencefocus\/wp-json\/wp\/v2\/media?parent=11928"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcsciencefocus\/wp-json\/wp\/v2\/categories?post=11928"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
","protected":false},"excerpt":{"rendered":"