Tools & Wizards About Us
usi-chem.com screenshot

Report Summary

  • 50

    Performance

    Renders faster than
    68% of other websites

  • 49

    Accessibility

    Visual factors better than
    that of 20% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 70

    SEO

    Google-friendlier than
    29% of websites

usi-chem.com

Silane Coupling Agent, Silane Water-proof Agent, Crosslinker Suppliers - NANJING UNION SILICON CHEMICAL CO., LTD.

Page Load Speed

2.6 sec in total

First Response

451 ms

Resources Loaded

2 sec

Page Rendered

154 ms

usi-chem.com screenshot

About Website

Visit usi-chem.com now to see the best up-to-date Usi Chem content and also check out these interesting facts you probably never knew about usi-chem.com

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Key Findings

We analyzed Usi-chem.com page load time and found that the first response time was 451 ms and then it took 2.1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

usi-chem.com performance score

50

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.6 s

32/100

10%

LCP (Largest Contentful Paint)

Value8.3 s

2/100

25%

SI (Speed Index)

Value4.7 s

69/100

10%

TBT (Total Blocking Time)

Value90 ms

99/100

30%

CLS (Cumulative Layout Shift)

Value0.409

24/100

15%

TTI (Time to Interactive)

Value6.5 s

58/100

10%

Network Requests Diagram

www.usi-chem.com

451 ms

side_bar.js

74 ms

common_functions.js

144 ms

kefu.css

149 ms

item.css

148 ms

Our browser made a total of 37 requests to load all elements on the main page. We found that 57% of them (21 requests) were addressed to the original Usi-chem.com, 35% (13 requests) were made to Img.waimaoniu.net and 5% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (803 ms) relates to the external source Img.waimaoniu.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 742.5 kB (42%)

Content Size

1.7 MB

After Optimization

1.0 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Usi-chem.com main page is 1.7 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 35% of websites need less resources to load. Images take 1.6 MB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 20.2 kB

  • Original 24.9 kB
  • After minification 19.0 kB
  • After compression 4.6 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 5.9 kB, which is 24% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 20.2 kB or 81% of the original size.

Image Optimization

-44%

Potential reduce by 714.4 kB

  • Original 1.6 MB
  • After minification 909.6 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Obviously, Usi Chem needs image optimization as it can save up to 714.4 kB or 44% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-6%

Potential reduce by 4.9 kB

  • Original 79.1 kB
  • After minification 79.0 kB
  • After compression 74.2 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. This website has mostly compressed JavaScripts.

CSS Optimization

-15%

Potential reduce by 3.0 kB

  • Original 19.7 kB
  • After minification 19.5 kB
  • After compression 16.7 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Usi-chem.com needs all CSS files to be minified and compressed as it can save up to 3.0 kB or 15% of the original size.

Requests Breakdown

Number of requests can be reduced by 13 (37%)

Requests Now

35

After Optimization

22

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 35 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Usi Chem. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

www.usi-chem.com

www.usi-chem.com

451 ms

side_bar.js

side_bar.js

74 ms

common_functions.js

common_functions.js

144 ms

kefu.css

kefu.css

149 ms

item.css

item.css

148 ms

style-usi-chem.css

style-usi-chem.css

224 ms

iconfont.css

iconfont.css

148 ms

jquery-1.8.3.min.js

jquery-1.8.3.min.js

229 ms

slider.js

slider.js

295 ms

base.js

base.js

238 ms

public.js

public.js

220 ms

menu.js

menu.js

220 ms

jquery.flexslider-min.js

jquery.flexslider-min.js

294 ms

jquery.extend.js

jquery.extend.js

308 ms

jquery.blockUI.js

jquery.blockUI.js

308 ms

js.php

js.php

573 ms

ga.js

ga.js

11 ms

201705231056462571.png

201705231056462571.png

434 ms

fun1.png

fun1.png

74 ms

201704071037030197.jpg

201704071037030197.jpg

803 ms

201704071037065479.jpg

201704071037065479.jpg

792 ms

201704071037111046.jpg

201704071037111046.jpg

698 ms

201705171046509285_s.jpg

201705171046509285_s.jpg

422 ms

201705181605345346_s.jpg

201705181605345346_s.jpg

453 ms

201705181722035937_s.jpg

201705181722035937_s.jpg

592 ms

201705181650230754_s.jpg

201705181650230754_s.jpg

561 ms

201705191414038193_s.jpg

201705191414038193_s.jpg

666 ms

201705200953097073_s.jpg

201705200953097073_s.jpg

677 ms

201705200913544138_s.jpg

201705200913544138_s.jpg

716 ms

201705171013332942_s.jpg

201705171013332942_s.jpg

793 ms

201704251407593160_s.jpg

201704251407593160_s.jpg

784 ms

__utm.gif

__utm.gif

22 ms

iconfont.woff

iconfont.woff

339 ms

hover_left.png

hover_left.png

76 ms

hover_right.png

hover_right.png

72 ms

c.jpg

c.jpg

76 ms

kefu_01.png

kefu_01.png

76 ms

Accessibility Review

usi-chem.com accessibility score

49

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Definition list items are not wrapped in <dl> elements

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

usi-chem.com best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

usi-chem.com SEO score

70

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

High

Image elements do not have [alt] attributes

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Usi-chem.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Usi-chem.com main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

usi-chem.com

Open Graph description is not detected on the main page of Usi Chem. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: